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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.
It's not a kata issue, Python (please say the language when the kata has more than one) code is ok. Test your code again with numbers like 992.
I'm having same error as many other in here. Testing my code in repl.it workes fine. But the tests fail. Please fix it.