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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.
on Python the last two tests seem to have some strange answers:
find_reverse_number(100), 909)
Is this correct? I would expect 18 here as the answer. The same goes for the final test.