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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.
Duplicate of https://www.codewars.com/kata/ordered-count-of-characters
Needs random tests.
Also your kata is under-specified, especially with your third test case. You're implying this is RLE but actually it's different.
Needs actual example test cases