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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.
Thank you, it's pretty clear
I'm almost there, but I don't understand the third task: keep such as non alphabetic and non digit characters. I'm waiting for explanation. Thank you in advance.
Thank you for the explanation, I got it.
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