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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.
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I think the tricky part was to check each of those 3X3 possible boxes.
nice ds practise kata
The tests are fine in Python. The control function does exactly that. There is a problem in your code:
Not a kata issue.
Nice fun kata