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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.
actually I had no trouble understanding the kata, and solved it
No news from you? I mark the issue as resolved.
I'm waiting for a clearer description of yours.
Maybe you can have a look at:
Read again the desription and see the examples. This kata might be a bit difficult for you:-)