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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.
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Haha, yeah I am struggling with that right now :)
pyton 3.* is not even enable in this kata...
You're welcome! :-)
It's a known CW problem:
https://github.com/Codewars/codewars-runner-cli/issues/508
https://stackoverflow.com/questions/10355818/python-utf-8-encoding-error
same question on SO.
the question is hard to answer. I don't know which language you are using, and what's the code. but it seems that you are using some special characters in your code.
I don't believe any of the test cases are presenting numeric strings. Each test case input should be a string of non-numeric characters or a list of integers.
Done