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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.
Yes it's true
No
It's not a kata issue, it's a problem with your code, using in inside the loop you're going twice over the list, that's the reason it's timing out.
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