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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.
Thanks for reply, can you send me more explanation about this concept or a doc or tutorial about it?
Same but in Python. I don't know know how to go around it.
Check what is the test input, reproduce it locally, and debug through it.