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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.
Though ull is enough,but guess the limit of one problem is not a good habit.So i think it should be marked on the introduce of this problem.Anyway this problem is 5kyu,and is easier than it should be.