diff --git a/concepts/strings/about.md b/concepts/strings/about.md
index 734cf5d9..874f8bbe 100644
--- a/concepts/strings/about.md
+++ b/concepts/strings/about.md
@@ -16,18 +16,54 @@ val s = "Escape backslash \\."
 // Escape backslash \.
 ```
 
-Raw strings use 3 double-quotes, and can contain arbitrary text (no need for escaping).
-Multiline strings are also supported, including flexible handling of indents.
+Multi-line strings are surrounded by 3 double-quotes, and can contain arbitrary text (no need for escaping).
 
 ```kotlin
 val multi = """I'm a
-    |multi-line
-    |string with special characters \ \t """
+    multi-line
+    string with special characters \ \t """
+//I'm a
+//    multi-line
+//    string with special characters  \ \t 
+```
+
+Use [trimIndent][trimIndent-doc] to remove the common indenting from the lines.
+This is useful for formatting the string:
+
+```kotlin
+val multi = """
+    I'm a
+      multi-line
+    string""".trimIndent()
 
-multi.trimMargin()  // delimiter defaults to | but can be specified
 //I'm a
-//multi-line
-//string with special characters  \ \t 
+//  multi-line
+//string
+```
+
+Alternatively, [trimMargin][trimMargin-doc] lets you specify a delimiter.
+Each line in the `String` then begins after the delimiter.
+The delimiter defaults to `|`, but you can specify a different delimiter as a parameter.
+For example:
+
+```kotlin
+val multi = """
+    |I'm a
+    |  multi-line
+    |string""".trimMargin()
+
+//I'm a
+//  multi-line
+//string
+
+val multi2 = """
+    start>I'm a
+    start>  multi-line
+    start>string""".trimMargin("start>")
+
+//I'm a
+//  multi-line
+//string
 ```
 
 Strings can be concatenated with `+`, but this is best limited to short and simple cases.
@@ -70,7 +106,7 @@ Mostly, these are [`extensions functions`][ref-extensions] rather than members o
 
 ~~~~exercism/note
 Kotlin's rather complex [documentation][ref-string-functions] pages hide extension functions in the default view.
-At moment of writing this, the most valuable content is hidden in a tab named `Members and Extensions`.
+At moment of writing this, the most valuable content is hidden in a tab named `Members & Extensions`.
 Click it to expand this section and see all the members and extensions available on the `String` class.
 
 [ref-string-functions]: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-string/
@@ -85,15 +121,19 @@ str.length              // => 12 (a property, not a function)
 str.elementAt(6)        // => W
 str.elementAtOrNull(20) // => null (index out of range)
 str.substring(6, 11)    // => "World"
+str.substringAfter(" ") // => "World!"
+
+str.lowercase()         // => "hello world!"
+str.uppercase()         // => "HELLO WORLD!"
 
-str.lowercase()        // => "hello world!"
-str.uppercase()        // => "HELLO WORLD!"
+str.startsWith("Hel")   // => true
+str.endsWith("xyz")     // => false
+str.indexOf("0")        // => 4
 
-str.startsWith("Hel")  // => true
-str.endsWith("xyz")    // => false
+str.toCharArray()       // => [H, e, l, l, o,  , W, o, r, l, d, !]
+"42".toInt() + 1        // => 43  (parsing; see also toFloat)
 
-str.toCharArray()      // => [H, e, l, l, o,  , W, o, r, l, d, !]
-"42".toInt() + 1       // => 43  (parsing; see also toFloat)
+"Howdy!  ".trim()       // => "Howdy"
 ```
 
 ## Building a string
@@ -157,3 +197,5 @@ val countDown = buildString {
 [ref-sb-deleterange]: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin.text/-string-builder/#-1622040372%2FFunctions%2F-956074838
 [ref-buildstring]: https://kotlinlang.org/docs/java-to-kotlin-idioms-strings.html#build-a-string
 [ref-jointostring]: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin.collections/join-to-string.html
+[trimIndent-doc]: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin.text/trim-indent.html
+[trimMargin-doc]: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin.text/trim-margin.html
diff --git a/concepts/strings/introduction.md b/concepts/strings/introduction.md
index 88d55e1c..465b38b3 100644
--- a/concepts/strings/introduction.md
+++ b/concepts/strings/introduction.md
@@ -6,27 +6,63 @@ A [`string`][ref-string] in Kotlin is an immutable sequence of Unicode character
 
 [`Unicode`][wiki-unicode] means that most of the world's writing systems can be represented, but (in contrast to older languages such as C) there is no 1:1 mapping between characters and bytes.
 
-A string is usually surrounded by double-quotes `" "`.
+A string is surrounded by double-quotes `" "`.
 
-Some characters need escaping: `\'`, `\\`, plus the usual non-printing characters such as `\t` (tab) and `\n` (newline).
+Some characters need escaping: `\\`, plus the usual non-printing characters such as `\t` (tab) and `\n` (newline).
 
 ```kotlin
-val s = "Escape apostrophe \' and backslash \\."
-// Escape apostrophe ' and backslash \.
+val s = "Escape backslash \\."
+// Escape backslash \.
 ```
 
-Raw strings use 3 double-quotes, and can contain arbitrary text (no need for escaping).
-Multiline strings are also supported, including flexible handling of indents.
+Multi-line strings are surrounded by 3 double-quotes, and can contain arbitrary text (no need for escaping).
 
 ```kotlin
 val multi = """I'm a
-    |multi-line
-    |string with special characters \ \t """
+    multi-line
+    string with special characters \ \t """
+//I'm a
+//    multi-line
+//    string with special characters  \ \t 
+```
+
+Use [trimIndent][trimIndent-doc] to remove the common indenting from the lines.
+This is useful for formatting the string:
+
+```kotlin
+val multi = """
+    I'm a
+      multi-line
+    string""".trimIndent()
 
-multi.trimMargin()  // delimiter defaults to | but can be specified
 //I'm a
-//multi-line
-//string with special characters  \ \t 
+//  multi-line
+//string
+```
+
+Alternatively, [trimMargin][trimMargin-doc] lets you specify a delimiter.
+Each line in the `String` then begins after the delimiter.
+The delimiter defaults to `|`, but you can specify a different delimiter as a parameter.
+For example:
+
+```kotlin
+val multi = """
+    |I'm a
+    |  multi-line
+    |string""".trimMargin()
+
+//I'm a
+//  multi-line
+//string
+
+val multi2 = """
+    start>I'm a
+    start>  multi-line
+    start>string""".trimMargin("start>")
+
+//I'm a
+//  multi-line
+//string
 ```
 
 Strings can be concatenated with `+`, but this is best limited to short and simple cases.
@@ -56,12 +92,12 @@ Mostly, these are [`extensions functions`][ref-extensions] rather than members o
 
 ~~~~exercism/note
 Kotlin's rather complex [documentation][ref-string-functions] pages hide extension functions in the default view.
-Be sure to click `Members and Extensions` to expand this section.
+Be sure to click `Members & Extensions` to expand this section.
 
 [ref-string-functions]: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-string/
 ~~~~
 
-The following example shows just a small selection of what is available:
+The following examples show just a small selection of what is available:
 
 ```kotlin
 val str = "Hello World!"
@@ -70,15 +106,19 @@ str.length              // => 12 (a property, not a function)
 str.elementAt(6)        // => W
 str.elementAtOrNull(20) // => null (index out of range)
 str.substring(6, 11)    // => "World"
+str.substringAfter(" ") // => "World!"
+
+str.lowercase()         // => "hello world!"
+str.uppercase()         // => "HELLO WORLD!"
 
-str.lowercase()        // => "hello world!"
-str.uppercase()        // => "HELLO WORLD!"
+str.startsWith("Hel")   // => true
+str.endsWith("xyz")     // => false
+str.indexOf("0")        // => 4
 
-str.startsWith("Hel")  // => true
-str.endsWith("xyz")    // => false
+str.toCharArray()       // => [H, e, l, l, o,  , W, o, r, l, d, !]
+"42".toInt() + 1        // => 43  (parsing; see also toFloat)
 
-str.toCharArray()      // => [H, e, l, l, o,  , W, o, r, l, d, !]
-"42".toInt() + 1       // => 43  (parsing; see also toFloat)
+"Howdy!  ".trim()       // => "Howdy"
 ```
 
 
@@ -88,3 +128,5 @@ str.toCharArray()      // => [H, e, l, l, o,  , W, o, r, l, d, !]
 [ref-stringbuilder]: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin.text/-string-builder/
 [ref-extensions]: https://kotlinlang.org/docs/extensions.html#extensions.md
 [ref-string-functions]: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-string/
+[trimIndent-doc]: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin.text/trim-indent.html
+[trimMargin-doc]: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin.text/trim-margin.html
diff --git a/config.json b/config.json
index 0f44a742..53a0c9b5 100644
--- a/config.json
+++ b/config.json
@@ -55,6 +55,18 @@
           "basics"
         ],
         "status": "wip"
+      },
+      {
+        "slug": "log-levels",
+        "name": "log-levels",
+        "uuid": "ef54c5e6-7d31-42d1-a300-e405169dbd7f",
+        "concepts": [
+          "strings"
+        ],
+        "prerequisites": [
+          "basics"
+        ],
+        "status": "wip"
       }
     ],
     "practice": [
diff --git a/exercises/concept/log-levels/.docs/hints.md b/exercises/concept/log-levels/.docs/hints.md
new file mode 100644
index 00000000..c6b26b8e
--- /dev/null
+++ b/exercises/concept/log-levels/.docs/hints.md
@@ -0,0 +1,28 @@
+# Hints
+
+## General
+
+- Kotlin provides many [functions][ref-strings] for working with Strings. Be sure to check out the `Members & Extensions` tab! 
+
+## 1. Get message from a log line
+
+- There is a [function][ref-string-substringAfter] to extract the part of a `String` after a given delimiter.
+- Removing whitespace from a `String` is explored in [Remove All Whitespaces from a String in Kotlin][tutorial-trim-white-space].
+
+## 2. Get log level from a log line
+
+- There is also a [function][ref-string-substringBefore] to extract part of a `String` _before_ a given delimiter.
+- There is a [way][ref-string-lowercase] to change a `String` to lowercase.
+
+## 3. Reformat a log line
+
+- [String templates][docs-string-template] can be done with a [multiline string][docs-string-multiline].
+
+[docs-string-multiline]: https://kotlinlang.org/docs/strings.html#multiline-strings
+[docs-string-template]: https://kotlinlang.org/docs/strings.html#string-templates
+[ref-strings]: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-string/
+[ref-string-indexOf]: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-string/#-537588047%2FFunctions%2F-1430298843
+[ref-string-lowercase]: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-string/#-648004414%2FFunctions%2F-956074838
+[ref-string-substringAfter]: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-string/#1564391517%2FFunctions%2F-1430298843
+[tutorial-search-text-in-string]: https://javarevisited.blogspot.com/2016/10/how-to-check-if-string-contains-another-substring-in-java-indexof-example.html
+[tutorial-trim-white-space]: https://www.baeldung.com/kotlin/string-remove-whitespace
diff --git a/exercises/concept/log-levels/.docs/instructions.md b/exercises/concept/log-levels/.docs/instructions.md
new file mode 100644
index 00000000..f320564d
--- /dev/null
+++ b/exercises/concept/log-levels/.docs/instructions.md
@@ -0,0 +1,29 @@
+# Instructions
+
+In this exercise you'll be processing log-liners.
+
+Each log line is a string formatted as follows: "[<LEVEL>]: <MESSAGE>*".
+
+## 1. Get the message from a log line
+
+Implement the `LogLevels.message()` function to return the message from a log line, with the leading and trailing whitespaces removed.
+
+## 2. Get the log level from a log line
+
+Implement the `LogLevels.logLevel()` function to return the log level from a log line in lower case.
+
+## 3. Reformat a log line
+
+Implement the `LogLevels.reformat()` method that takes a log line and a location string and reformats into a message containing two lines.
+The first line is formatted as `<LEVEL>@<LOCATIOON>:`, where:
+
+* `<LEVEL>` is the log level in lower case (as from 2. Get the log level from a log line).
+* `<LOCATION>` is the location given as the second parameter.
+
+The second line contains exactly two spaces, followed by the log message (as from 1. Get the message from a log line):
+
+```kotlin
+reformat("[TRACE]: Start of function", 2, 8)
+// => "trace@208:
+  Start of function"
+```
\ No newline at end of file
diff --git a/exercises/concept/log-levels/.docs/introduction.md b/exercises/concept/log-levels/.docs/introduction.md
new file mode 100644
index 00000000..c2c4dfcd
--- /dev/null
+++ b/exercises/concept/log-levels/.docs/introduction.md
@@ -0,0 +1,132 @@
+# Introduction
+
+A [`string`][ref-string] in Kotlin is an immutable sequence of Unicode characters.
+
+[`Immutable`][wiki-immutable] means that any operation on a string must return a new string: the original string can never change.
+
+[`Unicode`][wiki-unicode] means that most of the world's writing systems can be represented, but (in contrast to older languages such as C) there is no 1:1 mapping between characters and bytes.
+
+A string is usually surrounded by double-quotes `" "`.
+
+Some characters need escaping: `\'`, `\\`, plus the usual non-printing characters such as `\t` (tab) and `\n` (newline).
+
+```kotlin
+val s = "Escape apostrophe \' and backslash \\."
+// Escape apostrophe ' and backslash \.
+```
+
+Multi-line strings are surrounded by 3 double-quotes, and can contain arbitrary text (no need for escaping).
+
+```kotlin
+val multi = """I'm a
+    multi-line
+    string with special characters \ \t """
+//I'm a
+//    multi-line
+//    string with special characters  \ \t 
+```
+
+Use [trimIndent][trimIndent-doc] to remove the common indenting from the lines.
+This is useful for formatting the string:
+
+```kotlin
+val multi = """
+    I'm a
+      multi-line
+    string""".trimIndent()
+
+//I'm a
+//  multi-line
+//string
+```
+
+Alternatively, [trimMargin][trimMargin-doc] lets you specify a delimiter.
+Each line in the `String` then begins after the delimiter.
+The delimiter defaults to `|`, but you can specify a different delimiter as a parameter.
+For example:
+
+```kotlin
+val multi = """
+    |I'm a
+    |  multi-line
+    |string""".trimMargin()
+
+//I'm a
+//  multi-line
+//string
+
+val multi2 = """
+    start>I'm a
+    start>  multi-line
+    start>string""".trimMargin("start>")
+
+//I'm a
+//  multi-line
+//string
+```
+
+Strings can be concatenated with `+`, but this is best limited to short and simple cases.
+There are other and often better options.
+
+## String templates
+
+This refers to what some other languages call "interpolation".
+
+If a string contains a dollar sign `$`, followed by an identifier, or contains braces (`{expression}`) surrounding an expression, those are substituted by respectively the value or the result of the expression.
+
+```kotlin
+val x = 42
+val st = "x is $x, x squared is {x * x}"
+// x is 42, x squared is 1764
+```
+
+The braces `{ }` are needed around expressions when parsing would otherwise be ambiguous.
+
+In general, use of string templates is a more efficient and idiomatic way to combine strings than using `+`.
+
+## String functions
+
+Kotlin provides _many_ [`functions`][ref-string-functions] to manipulate strings.
+
+Mostly, these are [`extensions functions`][ref-extensions] rather than members of the `String` class, though this has little effect on how we use them.
+
+~~~~exercism/note
+Kotlin's rather complex [documentation][ref-string-functions] pages hide extension functions in the default view.
+Be sure to click `Members & Extensions` to expand this section.
+
+[ref-string-functions]: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-string/
+~~~~
+
+The following examples show just a small selection of what is available:
+
+```kotlin
+val str = "Hello World!"
+
+str.length              // => 12 (a property, not a function)
+str.elementAt(6)        // => W
+str.elementAtOrNull(20) // => null (index out of range)
+str.substring(6, 11)    // => "World"
+str.substringAfter(" ") // => "World!"
+
+str.lowercase()         // => "hello world!"
+str.uppercase()         // => "HELLO WORLD!"
+
+str.startsWith("Hel")   // => true
+str.endsWith("xyz")     // => false
+str.indexOf("0")        // => 4
+
+str.toCharArray()       // => [H, e, l, l, o,  , W, o, r, l, d, !]
+"42".toInt() + 1        // => 43  (parsing; see also toFloat)
+
+"Howdy!  ".trim()       // => "Howdy"
+```
+
+
+[ref-string]: https://kotlinlang.org/docs/strings.html
+[wiki-immutable]: https://en.wikipedia.org/wiki/Immutable_object
+[wiki-unicode]: https://en.wikipedia.org/wiki/Unicode
+[ref-stringbuilder]: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin.text/-string-builder/
+[ref-extensions]: https://kotlinlang.org/docs/extensions.html#extensions.md
+[ref-string-functions]: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-string/
+[trimIndent-doc]: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin.text/trim-indent.html
+[trimMargin-doc]: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin.text/trim-margin.html
diff --git a/exercises/concept/log-levels/.meta/config.json b/exercises/concept/log-levels/.meta/config.json
new file mode 100644
index 00000000..355bcab9
--- /dev/null
+++ b/exercises/concept/log-levels/.meta/config.json
@@ -0,0 +1,17 @@
+{
+  "authors": [
+    "kahgoh"
+  ],
+  "files": {
+    "solution": [
+      "src/main/kotlin/LogLevels.kt"
+    ],
+    "test": [
+      "src/test/kotlin/LogLevelsTest.kt"
+    ],
+    "exemplar": [
+      ".meta/src/reference/kotlin/LogLevels.kt"
+    ]
+  },
+  "blurb": "Learn about strings by processing logs."
+}
diff --git a/exercises/concept/log-levels/.meta/src/reference/kotlin/LogLevels.kt b/exercises/concept/log-levels/.meta/src/reference/kotlin/LogLevels.kt
new file mode 100644
index 00000000..2eef5d66
--- /dev/null
+++ b/exercises/concept/log-levels/.meta/src/reference/kotlin/LogLevels.kt
@@ -0,0 +1,14 @@
+fun message(logLine : String) : String {
+    return logLine.substringAfter(":").trim()
+}
+
+fun logLevel(logLine : String) : String {
+    return logLine.substringBefore(":").removeSurrounding("[", "]").lowercase()
+}
+
+fun reformat(logLine : String, location : String) : String {
+    return """
+        |${logLevel(logLine)}@$location:
+        |  ${message(logLine)}
+    """.trimMargin()
+}
\ No newline at end of file
diff --git a/exercises/concept/log-levels/build.gradle.kts b/exercises/concept/log-levels/build.gradle.kts
new file mode 100644
index 00000000..b1d5054b
--- /dev/null
+++ b/exercises/concept/log-levels/build.gradle.kts
@@ -0,0 +1,23 @@
+import org.gradle.api.tasks.testing.logging.TestExceptionFormat
+
+plugins {
+    kotlin("jvm")
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation(kotlin("stdlib-jdk8"))
+
+    testImplementation("junit:junit:4.13.2")
+    testImplementation(kotlin("test-junit"))
+}
+
+tasks.withType<Test> {
+    testLogging {
+        exceptionFormat = TestExceptionFormat.FULL
+        events("passed", "failed", "skipped")
+    }
+}
diff --git a/exercises/concept/log-levels/gradle/wrapper/gradle-wrapper.jar b/exercises/concept/log-levels/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 00000000..7f93135c
Binary files /dev/null and b/exercises/concept/log-levels/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/exercises/concept/log-levels/gradle/wrapper/gradle-wrapper.properties b/exercises/concept/log-levels/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 00000000..3fa8f862
--- /dev/null
+++ b/exercises/concept/log-levels/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/exercises/concept/log-levels/gradlew b/exercises/concept/log-levels/gradlew
new file mode 100755
index 00000000..1aa94a42
--- /dev/null
+++ b/exercises/concept/log-levels/gradlew
@@ -0,0 +1,249 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/exercises/concept/log-levels/gradlew.bat b/exercises/concept/log-levels/gradlew.bat
new file mode 100755
index 00000000..93e3f59f
--- /dev/null
+++ b/exercises/concept/log-levels/gradlew.bat
@@ -0,0 +1,92 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/exercises/concept/log-levels/settings.gradle.kts b/exercises/concept/log-levels/settings.gradle.kts
new file mode 100644
index 00000000..054e2f7e
--- /dev/null
+++ b/exercises/concept/log-levels/settings.gradle.kts
@@ -0,0 +1,13 @@
+pluginManagement {
+    repositories {
+        mavenCentral()
+        gradlePluginPortal()
+    }
+    resolutionStrategy {
+        eachPlugin {
+            when (requested.id.id) {
+                "org.jetbrains.kotlin.jvm" -> useModule("org.jetbrains.kotlin:kotlin-gradle-plugin:1.6.0")
+            }
+        }
+    }
+}
diff --git a/exercises/concept/log-levels/src/main/kotlin/LogLevels.kt b/exercises/concept/log-levels/src/main/kotlin/LogLevels.kt
new file mode 100644
index 00000000..93c867be
--- /dev/null
+++ b/exercises/concept/log-levels/src/main/kotlin/LogLevels.kt
@@ -0,0 +1,11 @@
+fun message(logLine : String) : String {
+    TODO("Please implement the message() function")
+}
+
+fun logLevel(logLine : String) : String {
+    TODO("Please implement the logLevel() function")
+}
+
+fun reformat(logLine : String, location : String) : String {
+    TODO("Please implement the reformat() method")
+}
\ No newline at end of file
diff --git a/exercises/concept/log-levels/src/test/kotlin/LogLevelsTest.kt b/exercises/concept/log-levels/src/test/kotlin/LogLevelsTest.kt
new file mode 100644
index 00000000..c5707d8f
--- /dev/null
+++ b/exercises/concept/log-levels/src/test/kotlin/LogLevelsTest.kt
@@ -0,0 +1,92 @@
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class LogLevelsTest {
+    @Test
+    fun `error message`() {
+        assertEquals("Stack overflow", message("[ERROR]: Stack overflow"))
+    }
+
+    @Test
+    fun `warning message`() {
+        assertEquals("Disk almost full", message("[WARNING]: Disk almost full"))
+    }
+
+    @Test
+    fun `info message`() {
+        assertEquals("File info", message("[INFO]: File info"))
+    }
+
+    @Test
+    fun `warning message with leading and trailing whitespace`() {
+        val logLine = """[WARNING]:     Timezone not set  
+        """
+        assertEquals("Timezone not set", message(logLine))
+    }
+
+    @Test
+    fun `error log level`() {
+        assertEquals("error", logLevel("[ERROR]: Stack overflow"))
+    }
+
+    @Test
+    fun `warning log level`() {
+        assertEquals("warning", logLevel("[WARNING]: Disk almost full"))
+    }
+
+    @Test
+    fun `info log level`() {
+        assertEquals("info", logLevel("[INFO]: File info"))
+    }
+
+    @Test
+    fun `warning log level with leading and trailing whitespace`() {
+        val logLine = """[WARNING]:     Timezone not set  
+        """
+        assertEquals("warning", logLevel(logLine))
+    }
+
+    @Test
+    fun `reformat error log line`() {
+        val expected = """
+           |error@code:
+           |  Segmentation fault
+        """.trimMargin()
+        assertEquals(expected, reformat("[ERROR]: Segmentation fault", "code"))
+    }
+
+    @Test
+    fun `reformat warn log line`() {
+        val expected = """
+            |warn@CPU:
+            |  High temperature
+        """.trimMargin()
+        assertEquals(expected, reformat("[WARN]: High temperature", "CPU"))
+    }
+
+    @Test
+    fun `reformat info log line`() {
+        val expected = """
+            |info@disk:
+            |  Disk defragmented
+        """.trimMargin()
+        assertEquals(expected, reformat("[INFO]: Disk defragmented", "disk"))
+    }
+
+    @Test
+    fun `reformat a log line with multiple whitespace`() {
+        val expected = """
+            |notice@shell:
+            |  Entered bad input too many times! 
+            |
+            |  This incident will be reported!
+        """.trimMargin()
+        val logLine = """
+            |[NOTICE]:     Entered bad input too many times! 
+            |
+            |  This incident will be reported!               
+                   
+        """.trimMargin()
+        assertEquals(expected, reformat(logLine, "shell"))
+    }
+}
\ No newline at end of file
diff --git a/exercises/settings.gradle.kts b/exercises/settings.gradle.kts
index bc770812..65e3dbc3 100644
--- a/exercises/settings.gradle.kts
+++ b/exercises/settings.gradle.kts
@@ -1,4 +1,8 @@
 include(
+    "concept:annalyns-infiltration",
+    "concept:cars-assemble",
+    "concept:log-levels",
+    "concept:lucians-luscious-lasagna",
     "practice:accumulate",
     "practice:acronym",
     "practice:all-your-base",