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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. An issue is a bug in the kata. Please refer to the documentation and don't raise issues so lightly in the future: https://docs.codewars.com/training/troubleshooting/
Can you explain precisely how this is a valid issue?