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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.
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I've added an Exception if there is a digit in a name and return false in this case, because there is the rule in a description. So, when I try to attempt, it fails every time, because there are several names with digits here every time. (PHP)