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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.
There are no such tests at least in Python, they all begin with
Corm.No, check the last column again. And maybe next time, paste the sudoku.
It just creates an entry v in the map (so v in seen returns True after that). It could be done using a set rather than a dictionary: seen.add(v).