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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.
Regarding the above solution: would it not be O(n)? Iterating through the list of ascii characters is O(1) – it always iterates through the 26 characters of the alphabet. Thus, checking the input of length n results in O(26 * n) = O(n). Dissenters welcome.
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