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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.
old kata == easy kata
Probably. Should have had more complex formats like "Twenty-seven hundred twenty-seven" and what not.
I think the kata is too easy for 4 kyu :)