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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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Why?
Nice job with the error!
Douche Bag.
A proper solution should pass for both positives and negatives, and this is just a simple kata...
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https://regexr.com/ is a great site for trying out and learning regex.
Check it out.
This comment is hidden because it contains spoiler information about the solution
This comment is hidden because it contains spoiler information about the solution