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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.
if @cwhy "marked first", does that mean that he can correct the incorrect solution that is connected to all the upvotes?
You marked first.
You are correct. I missed that. Thanks for pointing that out!
Should add 'and len(lst) == 4