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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.
Not a kata issue. Closing.
If you posted your code with a spoiler tag, someone might be able to take a look, but this definitely sounds like an issue with your code not the kata (I'm not sure what language you're in, but I just finished the kata in every language without issue).