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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.
Without knowing the programming language you are using and seeing your code, I have no way of knowing what you are trying to do.
But there are no weird restrictions on this kata.