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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.
Good point, but IIRC one had to assume that similar characters were not to be compared/considered.
This code doesn't work when spaces are involved:
sort_it('bill Gj, bell Ac, ball VC, bull Jc', 5)
result is:
["bill Gj", "bell Ac", "ball VC", "bull Jc"]