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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.
Hey zahrakaabi, try reading all these comments and then think of another solution. You appear to have it mostly correct, but you need to check for another situation as well. You may read comments to figure it out and it should help.