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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 see, but the point of my message is that it would probably be better to mention this nuance in the details of the kata, because it seems like I'm far not the first one to have such question =)
It's not said that although a room and a floor can't include 13 SEPARATELY, the RESULTING number actually can contain it. Fix this in the description, please!
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Very incoherent (or even wrong) instructions. I've figured out the task only after looking in discussion. Fix it, please.