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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Your code not working is not a kata issue. Read the documentation: https://docs.codewars.com/training/troubleshooting/
And please don't raise an issue because you don't understand something. Issues are to report bug in a kata. Post a question then.
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