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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.
I thought that the Test examples asked to read the numbers from the string and remove repeated cases! I should pay more attention next time :/. But better examples with diferent numbers than the ones into the string would be awesome.