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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.
you were absolutely right. it was my regex that was failing.
I am not sure to understand what you mean... Print the inputs to see which they are (and post them if you still have problems; it will be better than your code).
I am sure that there are no error in the fixed tests since they are the same in all languages.
You miss the fixed tests when you submit but you also miss the random ones.
Maybe take a new look at your code.
For now I consider the issue as resolved but you can post the inputs where you are failing and we will see which is the correct output needed in each case.
Cheers.
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