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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.
Need messages for submission test cases.
I think that maybe you should either make it shorter/easier or give more precise explanations, I found the text a little confusing (it's my first feedback for a new Kata though).