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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've tried several (Javascript) solutions, including one-liners with .every() (which by iteslf is an expensive operation) to simple for-loops. All of them pass the initial test but then time-out. Even loading this board took somewhere between 10-15 seconds. My guess is that I need to try this out another time, or just move on to another kata and ignore this one...