Raku: Acronym: Add solution

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diff --git a/raku/acronym/Acronym.rakumod b/raku/acronym/Acronym.rakumod
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+unit module Acronym;
+
+sub abbreviate(Str $phrase --> Str) is export {
+    $phrase.split((' ', '-'), :skip-empty).map(*.comb(/<[a..zA..Z]>/).first).join.uc
+}
diff --git a/raku/acronym/HELP.md b/raku/acronym/HELP.md
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+# Help
+
+## Running the tests
+
+You can run the test suite for the exercise by executing the command
+`prove6 .` in the exercise directory.
+
+## Submitting your solution
+
+You can submit your solution using the `exercism submit Acronym.rakumod` command.
+This command will upload your solution to the Exercism website and print the solution page's URL.
+
+It's possible to submit an incomplete solution which allows you to:
+
+- See how others have completed the exercise
+- Request help from a mentor
+
+## Need to get help?
+
+If you'd like help solving the exercise, check the following pages:
+
+- The [Raku track's documentation](https://exercism.org/docs/tracks/raku)
+- [Exercism's support channel on gitter](https://gitter.im/exercism/support)
+- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs)
+
+Should those resources not suffice, you could submit your (incomplete) solution to request mentoring.
+
+To get help if you're having trouble, you can use one of the following resources:
+
+- [Raku resources](https://raku.org/resources/)
+- [/r/rakulang](https://www.reddit.com/r/rakulang) is the Raku subreddit.
+- [StackOverflow](http://stackoverflow.com/questions/tagged/raku) can be used to search for your problem and see if it has been answered already. You can also ask and answer questions.
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diff --git a/raku/acronym/README.md b/raku/acronym/README.md
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+# Acronym
+
+Welcome to Acronym on Exercism's Raku Track.
+If you need help running the tests or submitting your code, check out `HELP.md`.
+
+## Instructions
+
+Convert a phrase to its acronym.
+
+Techies love their TLA (Three Letter Acronyms)!
+
+Help generate some jargon by writing a program that converts a long name
+like Portable Network Graphics to its acronym (PNG).
+
+## Source
+
+### Created by
+
+- @dcampos
+
+### Contributed to by
+
+- @m-dango
+
+### Based on
+
+Julien Vanier - https://github.com/monkbroc
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diff --git a/raku/acronym/acronym.rakutest b/raku/acronym/acronym.rakutest
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+#!/usr/bin/env raku
+use Test;
+use JSON::Fast;
+use lib $?FILE.IO.dirname;
+use Acronym;
+plan 9;
+
+my @test-cases = from-json($=pod[*-1].contents).List;
+for @test-cases -> %case {
+  is abbreviate(%case<input><phrase>), |%case<expected description>;
+}
+
+=head2 Test Cases
+=begin code
+[
+  {
+    "description": "basic",
+    "expected": "PNG",
+    "input": {
+      "phrase": "Portable Network Graphics"
+    },
+    "property": "abbreviate"
+  },
+  {
+    "description": "lowercase words",
+    "expected": "ROR",
+    "input": {
+      "phrase": "Ruby on Rails"
+    },
+    "property": "abbreviate"
+  },
+  {
+    "description": "punctuation",
+    "expected": "FIFO",
+    "input": {
+      "phrase": "First In, First Out"
+    },
+    "property": "abbreviate"
+  },
+  {
+    "description": "all caps word",
+    "expected": "GIMP",
+    "input": {
+      "phrase": "GNU Image Manipulation Program"
+    },
+    "property": "abbreviate"
+  },
+  {
+    "description": "punctuation without whitespace",
+    "expected": "CMOS",
+    "input": {
+      "phrase": "Complementary metal-oxide semiconductor"
+    },
+    "property": "abbreviate"
+  },
+  {
+    "description": "very long abbreviation",
+    "expected": "ROTFLSHTMDCOALM",
+    "input": {
+      "phrase": "Rolling On The Floor Laughing So Hard That My Dogs Came Over And Licked Me"
+    },
+    "property": "abbreviate"
+  },
+  {
+    "description": "consecutive delimiters",
+    "expected": "SIMUFTA",
+    "input": {
+      "phrase": "Something - I made up from thin air"
+    },
+    "property": "abbreviate"
+  },
+  {
+    "description": "apostrophes",
+    "expected": "HC",
+    "input": {
+      "phrase": "Halley's Comet"
+    },
+    "property": "abbreviate"
+  },
+  {
+    "description": "underscore emphasis",
+    "expected": "TRNT",
+    "input": {
+      "phrase": "The Road _Not_ Taken"
+    },
+    "property": "abbreviate"
+  }
+]
+=end code