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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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A few of the random test failed specifically with 'ing' or 'ion' and wouldn't add them to r. No idea why specifically those would not work right but after a few times hitting the random button I got tests passed.
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When doing substring in python the "end" index is not included in the result. So in your original code for "test" the substring would be [1:2] meaning that only index 1 would be included.
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