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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.
You can write the input to stdout to see what they are.
Also, this should be raise as a suggestion. It's not that much of a issue, you can still complete the kata with the current tests.