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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.
Changed instructions a little using conditional code blocks. Hope it's ok with the kata's author.
I'm 99% sure it's SQL.
Please, when you make comments like that and the kata has more than one language, state which one you're talking about.
The instructions aren't confusing at all, maybe the translation to some language isn't right.