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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.
timeout :)
Man, after hours of me trying. This is much simpler than my first solution. Now I can solve within a minute.
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What does (a&b) do? like what does that statement mean?