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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.
Backup your code, click reset, paste it and try again the sample tests, they work fine for me.
Care to explain what doesn't work exactly? Read this: https://docs.codewars.com/training/troubleshooting/