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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.
What language are you having trouble with? For Python, a word can have any amount of leading, trailing, or contained apostrophes, but important part is that it has to contain at least one letter. So a sequence of only apostrophes is not a valid word.
I remember also having problems with getting my implementation right.