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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.
We did almost the exact same thing to the letter....
[x] ++ " " ++ (some list)
is better handled as
x : ' ' : (some list)
fromJust :S
fromJust D: