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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.
so damn true... haha
don't do it in a real life use case. we're only doing it here because we can and that this is a recreational site where solutions run through very simple test cases, you will run into problems and a lot of questions if you do it with less clear constraints in code that people actually depend on