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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.
No answer after a month and you passed the kata, closing.
Without seeing your whole code I can't tell for sure, but the kata works for me, try posting your code with markdown formatting and marking your post as having spoiler content.