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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're right
Super smart to read it backwards. However, it doesn't handle a case where the number of repetitions has more than 1 digit (like in '16(ab)'), instructions are unclear on that point