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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.
I used your idea and wrote my decision. It seems to me that it is more understandable than yours.
For your consideration.
Hey, it took me 4 days, but I actually did it =D
I enjoyed this one a lot, so thanks for posting.
On the minus side, the published solutions are not so readable =(