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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.
pythontutor.com
What's your Python visualizer of choice?
is this real ?
Wow, this submission really tripped me up. I had to use a visualizer to see what was being done. Very clever.