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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.
apparently some more particularly random tests are needed
not a good practice as we are splitting the string and indexing it at each iteration while it can be done only once