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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.
It is unclear what the actual question is. I only solved it from looking at the sample tests and plugging the info directly in.
It would be helpful to have the question explicity written after the story, with examples.