diff --git a/config.json b/config.json
index 6d40e34d..ce1e6d55 100644
--- a/config.json
+++ b/config.json
@@ -321,6 +321,14 @@
         "prerequisites": [],
         "difficulty": 3
       },
+      {
+        "slug": "secret-handshake",
+        "name": "Secret Handshake",
+        "uuid": "d643cdac-949f-430b-989e-bb0380627580",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 2
+      },
       {
         "slug": "pascals-triangle",
         "name": "Pascal's Triangle",
diff --git a/exercises/practice/secret-handshake/.docs/instructions.md b/exercises/practice/secret-handshake/.docs/instructions.md
new file mode 100644
index 00000000..d4d57b80
--- /dev/null
+++ b/exercises/practice/secret-handshake/.docs/instructions.md
@@ -0,0 +1,27 @@
+# Instructions
+
+> There are 10 types of people in the world: Those who understand
+> binary, and those who don't.
+
+You and your fellow cohort of those in the "know" when it comes to
+binary decide to come up with a secret "handshake".
+
+```text
+00001 = wink
+00010 = double blink
+00100 = close your eyes
+01000 = jump
+
+
+10000 = Reverse the order of the operations in the secret handshake.
+```
+
+Given a decimal number, convert it to the appropriate sequence of events for a secret handshake.
+
+Here's a couple of examples:
+
+Given the decimal input 3, the function would return the array
+["wink", "double blink"] because the decimal number 3 is 2+1 in powers of two and thus `11` in binary.
+
+Let's now examine the input 19 which is 16+2+1 in powers of two and thus `10011` in binary.
+Recalling that the addition of 16 (`10000` in binary) reverses an array and that we already know what array is returned given input 3, the array returned for input 19 is ["double blink", "wink"].
diff --git a/exercises/practice/secret-handshake/.docs/introduction.md b/exercises/practice/secret-handshake/.docs/introduction.md
new file mode 100644
index 00000000..450e6092
--- /dev/null
+++ b/exercises/practice/secret-handshake/.docs/introduction.md
@@ -0,0 +1,27 @@
+# Introduction
+
+> There are 10 types of people in the world: Those who understand
+> binary, and those who don't.
+
+You and your fellow cohort of those in the "know" when it comes to
+binary decide to come up with a secret "handshake".
+
+```text
+00001 = wink
+00010 = double blink
+00100 = close your eyes
+01000 = jump
+
+
+10000 = Reverse the order of the operations in the secret handshake.
+```
+
+Given a decimal number, convert it to the appropriate sequence of events for a secret handshake.
+
+Here's a couple of examples:
+
+Given the decimal input 3, the function would return the array
+["wink", "double blink"] because the decimal number 3 is 2+1 in powers of two and thus `11` in binary.
+
+Let's now examine the input 19 which is 16+2+1 in powers of two and thus `10011` in binary.
+Recalling that the addition of 16 (`10000` in binary) reverses an array and that we already know what array is returned given input 3, the array returned for input 19 is ["double blink", "wink"].
diff --git a/exercises/practice/secret-handshake/.meta/config.json b/exercises/practice/secret-handshake/.meta/config.json
new file mode 100644
index 00000000..ddc680b8
--- /dev/null
+++ b/exercises/practice/secret-handshake/.meta/config.json
@@ -0,0 +1,23 @@
+{
+  "authors": [
+    "kapitaali"
+  ],
+  "files": {
+    "solution": [
+      "src/secret-handshake.cob"
+    ],
+    "test": [
+      "tst/secret-handshake/secret-handshake.cut"
+    ],
+    "example": [
+      ".meta/proof.ci.cob" 
+    ],
+    "invalidator": [
+      "test.sh",
+      "test.ps1"
+    ]
+  },
+  "blurb": "Given a decimal number, convert it to the appropriate sequence of events for a secret handshake.",
+  "source": "Bert, in Mary Poppins",
+  "source_url": "http://www.imdb.com/title/tt0058331/quotes/qt0437047"
+}
diff --git a/exercises/practice/secret-handshake/.meta/proof.ci.cob b/exercises/practice/secret-handshake/.meta/proof.ci.cob
new file mode 100644
index 00000000..ab399f55
--- /dev/null
+++ b/exercises/practice/secret-handshake/.meta/proof.ci.cob
@@ -0,0 +1,90 @@
+       IDENTIFICATION DIVISION.
+       PROGRAM-ID. SECRET-HANDSHAKE.
+       AUTHOR. kapitaali.
+       ENVIRONMENT DIVISION.
+       DATA DIVISION.
+       WORKING-STORAGE SECTION.
+       01 WS-INPUT                 PIC 999.
+       01 WS-RESULT                PIC X(60).
+       01 STR                      PIC X(5) VALUE '00000'.
+       01 CC                       PIC 99.
+
+       PROCEDURE DIVISION.
+
+       COMMANDS. 
+           MOVE '00000' TO STR.
+           MOVE SPACES TO WS-RESULT. 
+           IF WS-INPUT = 0
+              MOVE SPACES TO WS-RESULT 
+              EXIT PARAGRAPH 
+           END-IF.
+           IF WS-INPUT >= 16
+              SUBTRACT 16 FROM WS-INPUT 
+              MOVE '1' TO STR(1:1)
+           END-IF.
+           IF WS-INPUT >= 8
+              SUBTRACT 8 FROM WS-INPUT 
+              MOVE '1' TO STR(2:1) 
+           END-IF.
+           IF WS-INPUT >= 4
+              SUBTRACT 4 FROM WS-INPUT 
+              MOVE '1' TO STR(3:1) 
+           END-IF.
+           IF WS-INPUT >= 2
+              SUBTRACT 2 FROM WS-INPUT 
+              MOVE '1' TO STR(4:1) 
+           END-IF.
+           IF WS-INPUT = 1
+              SUBTRACT 1 FROM WS-INPUT 
+              MOVE '1' TO STR(5:1)              
+           END-IF.
+           IF STR(1:1) IS EQUAL TO "0"
+              PERFORM NORMAL-ORDER 
+           ELSE 
+              PERFORM REVERSE-ORDER 
+           END-IF.
+
+
+       NORMAL-ORDER.
+           MOVE 1 TO CC.
+           IF STR(5:1) = '1'
+              MOVE "wink," TO WS-RESULT(CC:5)
+              ADD 5 TO CC
+           END-IF.
+           IF STR(4:1) = '1'
+              MOVE "double blink," TO WS-RESULT(CC:13)
+              ADD 13 TO CC
+           END-IF.
+           IF STR(3:1) = '1'
+              MOVE "close your eyes," TO WS-RESULT(CC:16)
+              ADD 16 TO CC
+           END-IF.
+           IF STR(2:1) = '1'
+              MOVE "jump," TO WS-RESULT(CC:5)
+              ADD 5 TO CC
+           END-IF.
+           SUBTRACT 1 FROM CC.
+           MOVE SPACE TO WS-RESULT(CC:1).
+
+
+       REVERSE-ORDER.
+           MOVE 1 TO CC.
+           IF STR(2:1) = '1'
+              MOVE "jump," TO WS-RESULT(CC:5)
+              ADD 5 TO CC
+           END-IF.
+           IF STR(3:1) = '1'
+              MOVE "close your eyes," TO WS-RESULT(CC:16)
+              ADD 16 TO CC
+           END-IF. 
+           IF STR(4:1) = '1'
+              MOVE "double blink," TO WS-RESULT(CC:13)
+              ADD 13 TO CC
+           END-IF.
+           IF STR(5:1) = '1'
+              MOVE "wink," TO WS-RESULT(CC:5)
+              ADD 5 TO CC
+           END-IF.
+           SUBTRACT 1 FROM CC.
+           MOVE SPACE TO WS-RESULT(CC:1).
+
diff --git a/exercises/practice/secret-handshake/bin/fetch-cobolcheck b/exercises/practice/secret-handshake/bin/fetch-cobolcheck
new file mode 100755
index 00000000..64230fe2
--- /dev/null
+++ b/exercises/practice/secret-handshake/bin/fetch-cobolcheck
@@ -0,0 +1,63 @@
+#!/usr/bin/env bash
+
+# This file is a copy of the
+# https://github.com/exercism/configlet/blob/main/scripts/fetch-configlet file.
+# Please submit bugfixes/improvements to the above file to ensure that all tracks benefit from the changes.
+
+# set -eo pipefail
+
+readonly LATEST='https://api.github.com/repos/0xE282B0/cobol-check/releases/latest'
+
+case "$(uname)" in
+  Darwin*)   os='mac'     ;;
+  Linux*)    os='linux'   ;;
+  Windows*)  os='windows' ;;
+  MINGW*)    os='windows' ;;
+  MSYS_NT-*) os='windows' ;;
+  *)         os='linux'   ;;
+esac
+
+case "${os}" in
+  windows*) ext='.exe' ;;
+  *)        ext='' ;;
+esac
+
+arch="$(uname -m)"
+
+curlopts=(
+  --silent
+  --show-error
+  --fail
+  --location
+  --retry 3
+)
+
+if [[ -n "${GITHUB_TOKEN}" ]]; then
+  curlopts+=(--header "authorization: Bearer ${GITHUB_TOKEN}")
+fi
+
+suffix="${os}-${arch}${ext}"
+
+get_download_url() {
+  curl "${curlopts[@]}" --header 'Accept: application/vnd.github.v3+json' "${LATEST}" |
+    grep "\"browser_download_url\": \".*/download/.*/cobol-check.*${suffix}\"$" |
+    cut -d'"' -f4
+}
+
+main() {
+  if [[ -d ./bin ]]; then
+    output_dir="./bin"
+  elif [[ $PWD == */bin ]]; then
+    output_dir="$PWD"
+  else
+    echo "Error: no ./bin directory found. This script should be ran from a repo root." >&2
+    return 1
+  fi
+
+  output_path="${output_dir}/cobolcheck${ext}"
+  download_url="$(get_download_url)"
+  curl "${curlopts[@]}" --output "${output_path}" "${download_url}"
+  chmod +x "${output_path}"
+}
+
+main
diff --git a/exercises/practice/secret-handshake/bin/fetch-cobolcheck.ps1 b/exercises/practice/secret-handshake/bin/fetch-cobolcheck.ps1
new file mode 100644
index 00000000..261f5f45
--- /dev/null
+++ b/exercises/practice/secret-handshake/bin/fetch-cobolcheck.ps1
@@ -0,0 +1,28 @@
+# This file is a copy of the
+# https://github.com/exercism/configlet/blob/main/scripts/fetch-configlet.ps1 file.
+# Please submit bugfixes/improvements to the above file to ensure that all tracks
+# benefit from the changes.
+
+$ErrorActionPreference = "Stop"
+$ProgressPreference = "SilentlyContinue"
+
+$requestOpts = @{
+    Headers           = If ($env:GITHUB_TOKEN) { @{ Authorization = "Bearer ${env:GITHUB_TOKEN}" } } Else { @{ } }
+    MaximumRetryCount = 3
+    RetryIntervalSec  = 1
+}
+
+$arch = If ([Environment]::Is64BitOperatingSystem) { "amd64" } Else { "x86" }
+$fileName = "cobol-check-windows-$arch.exe"
+
+Function Get-DownloadUrl {
+    $latestUrl = "https://api.github.com/repos/0xE282B0/cobol-check/releases/latest"
+    Invoke-RestMethod -Uri $latestUrl -PreserveAuthorizationOnRedirect @requestOpts
+    | Select-Object -ExpandProperty assets
+    | Where-Object { $_.browser_download_url -match $FileName }
+    | Select-Object -ExpandProperty browser_download_url
+}
+
+$downloadUrl = Get-DownloadUrl
+$outputFile = Join-Path -Path $PSScriptRoot -ChildPath "cobolcheck.exe"
+Invoke-WebRequest -Uri $downloadUrl -OutFile $outputFile @requestOpts
\ No newline at end of file
diff --git a/exercises/practice/secret-handshake/config.properties b/exercises/practice/secret-handshake/config.properties
new file mode 100644
index 00000000..2c5a6c8e
--- /dev/null
+++ b/exercises/practice/secret-handshake/config.properties
@@ -0,0 +1,183 @@
+# Configuration settings for Cobol Check
+
+#---------------------------------------------------------------------------------------------------------------------
+# This configuration - echoed to console when Cobol Check is executed, for information only.
+#---------------------------------------------------------------------------------------------------------------------
+config.loaded = production
+
+#---------------------------------------------------------------------------------------------------------------------
+# Prefix for field names and paragraph names in the test management code that cobol-check
+# inserts into programs to be tested. The default is "UT-". If this conflicts with names
+# in the programs to be tested, you can override it with a value you specify here.
+# The value must be 3 characters or less. Cannot be empty.
+#---------------------------------------------------------------------------------------------------------------------
+cobolcheck.prefix = UT-
+
+#---------------------------------------------------------------------------------------------------------------------
+# Tags written in the generated test code in the form of a comment, when a code injection starts and ends.
+# Default is null, which will prevent the tags from appearing. Any other value will appear as comments
+# surrounding the injected code.
+# Examples:
+# cobolcheck.injectedCodeTag.start = ###INJECT START###
+# cobolcheck.injectedCodeTag.end = ###INJECT END###
+#---------------------------------------------------------------------------------------------------------------------
+cobolcheck.injectedCodeTag.start = null
+cobolcheck.injectedCodeTag.end = null
+
+#---------------------------------------------------------------------------------------------------------------------
+# A tag written at the start of entities stubbed by default. Recommended value-length <= 4.
+# Note: The tag will appear only when cobolcheck stubs lines by default.
+# This is the case for CALLs and batch file IO verbs.
+# Default is null, which will prevent the tag from appearing.
+#---------------------------------------------------------------------------------------------------------------------
+cobolcheck.stub.comment.tag = null
+
+#---------------------------------------------------------------------------------------------------------------------
+# Determines if cobolcheck should generate code, such that decimal point is comma.
+# The default is "false". The value should be set to "true" if the compiler is set to
+# read decimal points as commas. If the cobol source program sets DECIMAL-POINT IS COMMA,
+# this configuration will be overwritten.
+# Example: 1,385,481.00 (decimalPointIsComma = false)
+# Example: 1.385.481,00 (decimalPointIsComma = true)
+#---------------------------------------------------------------------------------------------------------------------
+cobolcheck.decimalPointIsComma = false
+
+#---------------------------------------------------------------------------------------------------------------------
+# If the source program contains rules as the first line follwed by CBL, the given value will be appended
+# to this.
+# If no CBL is found in source, it will be added along with the given value
+# default is null, which will make no changes.
+#---------------------------------------------------------------------------------------------------------------------
+cobolcheck.append.rules = null
+
+#---------------------------------------------------------------------------------------------------------------------
+# Path for the generated Cobol test code
+# Default: ./
+#---------------------------------------------------------------------------------------------------------------------
+cobolcheck.test.program.path = ./
+
+#---------------------------------------------------------------------------------------------------------------------
+# Suffix to append to the name of each program under test to produce the name of the corresponding
+# test program that contains the merged test code.
+# Example: For program ABCXYZ4, if suffix is T.CBL then the test program name will be ABCXYZ4T.CBL.
+#---------------------------------------------------------------------------------------------------------------------
+cobolcheck.test.program.name = test.cob
+
+#---------------------------------------------------------------------------------------------------------------------
+# Path for the generated testsuite parse error log
+# Default: ./
+#---------------------------------------------------------------------------------------------------------------------
+testsuite.parser.error.log.path = ./
+
+#---------------------------------------------------------------------------------------------------------------------
+# Name of the generated testsuite parse error log file - with extension
+# Default: ParserErrorLog.txt
+#---------------------------------------------------------------------------------------------------------------------
+testsuite.parser.error.log.name = ParserErrorLog.txt
+
+#---------------------------------------------------------------------------------------------------------------------
+# The charset that cobolcheck will use when reading- and writing to files.
+# See https://docs.oracle.com/javase/8/docs/technotes/guides/intl/encoding.doc.html, for a list of
+# valid values.
+# Default value for each OS is <default>, which will use the default encoding for the OS.
+#---------------------------------------------------------------------------------------------------------------------
+cobolcheck.file.encoding.linux = default
+cobolcheck.file.encoding.macosx = default
+cobolcheck.file.encoding.windows = default
+cobolcheck.file.encoding.zos = default
+cobolcheck.file.encoding.unix = default
+
+#---------------------------------------------------------------------------------------------------------------------
+# Sets permissions for all files generated by Cobol Check, for all users.
+# If read, write and execute permissions are set, all users can perform said actions on all files
+# that Cobol Check generates.
+# Value can be any permutation of the letters: 'rwx' (read, write, execute) or none - meaning no permissions.
+# Default value: rx
+#---------------------------------------------------------------------------------------------------------------------
+generated.files.permission.all = rx
+
+#---------------------------------------------------------------------------------------------------------------------
+# Determines if Cobol Check should run the generated test program.
+# Default is true.
+# If set to false, Cobol Check will generate the code, but not run it. If more than one program
+# is given as a command line option, the generated test file will be overwritten. Thus if set to false,
+# only one program should be given at a time.
+#---------------------------------------------------------------------------------------------------------------------
+cobolcheck.test.run = false
+
+#---------------------------------------------------------------------------------------------------------------------
+# These settings are to locate the application code under test in *your* Cobol project directory tree.
+# Can be absolute path or relative to project root.
+#---------------------------------------------------------------------------------------------------------------------
+application.source.directory = src
+application.copybook.directory = cpy
+
+#---------------------------------------------------------------------------------------------------------------------
+# Location of test suite input file(s). This can also be passed on command-line option --test-suite-path.
+#---------------------------------------------------------------------------------------------------------------------
+test.suite.directory = tst
+
+#---------------------------------------------------------------------------------------------------------------------
+# Location of test output. File extension is determined by a given format.
+#---------------------------------------------------------------------------------------------------------------------
+test.results.file = output/testResults
+
+#---------------------------------------------------------------------------------------------------------------------
+# Determines the format of the test results written to the output file.
+# Supported formats: txt, xml, html.
+#---------------------------------------------------------------------------------------------------------------------
+test.results.format = txt
+
+#---------------------------------------------------------------------------------------------------------------------
+# Determines the format style of the test results written to the output file.
+# The style controls the hierarchy and structure of data and naming of the 'object' that is written
+# in a given format. Format: txt and style: directOutput are exclusive. txt cannot use any other style
+# than directOutput, and directOutput cannot be used with any other format than txt.
+# Other formats and styles can be used interchangeably.
+# Supported styles: directOutput, JUnit, tableDocument, tableEmbed
+#---------------------------------------------------------------------------------------------------------------------
+test.results.format.style = directOutput
+
+#---------------------------------------------------------------------------------------------------------------------
+# If application source filenames have a suffix, specify it here without the period or dot.
+#---------------------------------------------------------------------------------------------------------------------
+application.source.filename.suffix = CBL,cbl,COB,cob
+
+#---------------------------------------------------------------------------------------------------------------------
+# If application copybook filenames have a suffix, specify it here without the period or dot
+# e.g. application.copybook.filename.suffix = CBL
+#---------------------------------------------------------------------------------------------------------------------
+application.copybook.filename.suffix = CBL,cbl,COB,cob
+
+#---------------------------------------------------------------------------------------------------------------------
+# Optional override of system default Locale for log messages and exception messages.
+#---------------------------------------------------------------------------------------------------------------------
+#locale.language = ja
+#locale.country =
+#locale.variant =
+
+#---------------------------------------------------------------------------------------------------------------------
+# Cobol Check concatenates multiple test suite input files into a single file for the Generator.
+# This is the relative or absolute path of the concatenated file. If not specified, the default
+# is "./ALLTESTS" relative to the directory in which Cobol Check was started.
+#---------------------------------------------------------------------------------------------------------------------
+concatenated.test.suites = ./ALLTESTS
+
+#---------------------------------------------------------------------------------------------------------------------
+# Shell scripts and JCL files for executing your test suites.
+# Cobol Check will invoke one of these after creating the copy of the program under test that contains
+# test code generated from your test suites.
+# Unix and Mac OS X are both treated as unix. Most unices can run the linux script.
+# Unix is the default.
+# You can write custom scripts/JCL for your environment, for instance if you are using a different Cobol compiler.
+# The first element in these names reflects the first few characters returned by Java's System.getProperty("os.name").
+# Cobol Check will select one of these entries based on which platform it thinks it's running on.
+#---------------------------------------------------------------------------------------------------------------------
+
+cobolcheck.script.directory = scripts
+linux.process = linux_gnucobol_run_tests
+osx.process = linux_gnucobol_run_tests
+freebsd.process = linux_gnucobol_run_tests
+windows.process = windows_gnucobol_run_tests.cmd
+zos.process =
+unix.process = linux_gnucobol_run_tests
diff --git a/exercises/practice/secret-handshake/src/secret-handshake.cob b/exercises/practice/secret-handshake/src/secret-handshake.cob
new file mode 100644
index 00000000..d02cb6ed
--- /dev/null
+++ b/exercises/practice/secret-handshake/src/secret-handshake.cob
@@ -0,0 +1,11 @@
+       IDENTIFICATION DIVISION.
+       PROGRAM-ID. SECRET-HANDSHAKE.
+       ENVIRONMENT DIVISION.
+       DATA DIVISION.
+       WORKING-STORAGE SECTION.
+       01 WS-INPUT                 PIC 999.
+       01 WS-RESULT                PIC X(60).
+
+       PROCEDURE DIVISION.
+
+       COMMANDS. 
\ No newline at end of file
diff --git a/exercises/practice/secret-handshake/test.ps1 b/exercises/practice/secret-handshake/test.ps1
new file mode 100644
index 00000000..ccfa530a
--- /dev/null
+++ b/exercises/practice/secret-handshake/test.ps1
@@ -0,0 +1,16 @@
+$slug=Split-Path $PSScriptRoot -Leaf
+
+if (![System.IO.File]::Exists("$PSScriptRoot\bin\cobolcheck.exe")){
+  Write-Output "Cobolcheck not found. Trying to fetch it."
+  & "$PSScriptRoot\bin\fetch-cobolcheck.ps1"
+}
+
+Write-Output "Run cobolcheck."
+Set-Location $PSScriptRoot
+
+Invoke-Expression "bin\cobolcheck.exe -p $slug"
+Invoke-Expression "cobc -xj test.cob"
+
+if ($Lastexitcode -ne 0) {
+  exit $Lastexitcode
+}
diff --git a/exercises/practice/secret-handshake/test.sh b/exercises/practice/secret-handshake/test.sh
new file mode 100755
index 00000000..ed4a27a1
--- /dev/null
+++ b/exercises/practice/secret-handshake/test.sh
@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )/
+SLUG=${1:-$(basename "${SCRIPT_DIR}")}
+COBOLCHECK=./bin/cobolcheck
+
+WHICH_COBOLCHECK=$(which cobolcheck)
+if [[ $? -eq 0 ]] ; then
+    echo "Found cobolcheck, using $COBOLCHECK"
+    COBOLCHECK=$WHICH_COBOLCHECK
+elif [ ! -f $SCRIPT_DIR/bin/cobolcheck ]; then
+    echo "Cobolcheck not found, try to fetch it."
+    cd $SCRIPT_DIR/bin/
+    bash fetch-cobolcheck
+fi
+cd $SCRIPT_DIR
+$COBOLCHECK -p $SLUG
+
+# compile and run
+echo "COMPILE AND RUN TEST"
+cobc -xj test.cob
diff --git a/exercises/practice/secret-handshake/tst/secret-handshake/secret-handshake.cut b/exercises/practice/secret-handshake/tst/secret-handshake/secret-handshake.cut
new file mode 100644
index 00000000..29542192
--- /dev/null
+++ b/exercises/practice/secret-handshake/tst/secret-handshake/secret-handshake.cut
@@ -0,0 +1,55 @@
+TestCase "wink for 1"
+	MOVE 1 TO WS-INPUT
+	PERFORM COMMANDS
+	EXPECT WS-RESULT = "wink"
+ 
+TestCase "double blink for 10"
+	MOVE 2 TO WS-INPUT
+	PERFORM COMMANDS
+	EXPECT WS-RESULT = "double blink"
+
+TestCase "close your eyes for 100"
+	MOVE 4 TO WS-INPUT
+	PERFORM COMMANDS
+	EXPECT WS-RESULT = "close your eyes"
+
+TestCase "jump for 1000"
+	MOVE 8 TO WS-INPUT
+	PERFORM COMMANDS
+	EXPECT WS-RESULT = "jump"
+
+TestCase "combine two actions"
+	MOVE 3 TO WS-INPUT
+	PERFORM COMMANDS
+	EXPECT WS-RESULT = "wink,double blink"
+
+TestCase "reverse two actions"
+	MOVE 19 TO WS-INPUT
+	PERFORM COMMANDS
+	EXPECT WS-RESULT = "double blink,wink"
+ 
+TestCase "reversing one action gives the same action"
+	MOVE 24 TO WS-INPUT
+	PERFORM COMMANDS
+	EXPECT WS-RESULT = "jump"
+
+TestCase "reversing no actions still gives no actions"
+	MOVE 16 TO WS-INPUT
+	PERFORM COMMANDS
+	EXPECT WS-RESULT = " "
+
+TestCase "all possible actions"
+	MOVE 15 TO WS-INPUT
+	PERFORM COMMANDS
+	EXPECT WS-RESULT = "wink,double blink,close your eyes,jump"
+
+TestCase "reverse all possible actions"
+	MOVE 31 TO WS-INPUT
+	PERFORM COMMANDS
+	EXPECT WS-RESULT = "jump,close your eyes,double blink,wink"
+
+TestCase "do nothing for zero"
+	MOVE 0 TO WS-INPUT
+	PERFORM COMMANDS
+	EXPECT WS-RESULT = " "
+