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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.
The tests are passing the 'base'-list as a reference to your function, which means that the 'base'-list will be modified if your function doesn't copy it before usage.
Testing in Python 3.8 gives "NameError: name 'Test' is not defined" whereas Python 3.6 works fine
The tests are trash and are not consistent at all. For example, 101 is "I", 1001 is "EE", 100001 is "EE", and then all of a sudden 10000001 is "E E"...