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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 don't think
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discards duplicate values, or does it?This comment is hidden because it contains spoiler information about the solution
i know, it was very late when i did this :)
this answer is funny~