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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.
The Kata is themed Regex validate PIN code so I believe regex is the go word here.
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Thanks for the explanation.
I learn more.
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iirc you could also do {4, 6}
I like this one
Beatiful
sexy
Good one.
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