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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.
If it were to do complete test for multi-char glyphs it would get way out of the scope of a 7kyu, specially once you consider variant selectors, combining diacritical marks, RTL text and regional indicators. Properly reversing a string is not an easy task.