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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.
repeatedly converting the input string to lowercase
oops, I see that this has already been mentioned
Nice comment
loved this one, ty!
I think he noticed that but he just sacrificed performance for compactness
Brilliant!