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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.
Yeah, clear now, thanks! Now I cannot delete this stupid solution, while I could the previous one. I cannot see any Remove and Edit button. How come?
this is also an answer: [559756, 893250]
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This comment is hidden because it contains spoiler information about the solution