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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.
These were easy to spot. Maybe there're more issues with it.
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The tests should be correct. Looking at how complicated yout solution is, I'm sure there's a mistake in it. If you want somebody to help you, post your regex enclosed in backticks (``) so that it would be formatted correctly.
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Ok, after I solve it in some more languages, I'll do it.
Only python has the mutating issue. Could you fix that yourself? The test cases ae locked and I'm not 10k...
Because you're mutating the input. Don't do it.
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