How long is the Super Bowl on average? Here's what to know about the length of the last 20 Super Bowls, all of which have taken at least 3 hours and 14 minutes to complete. The average length of ...
Given a string s and an integer k, return the maximum number of vowel letters in any substring of s with length k. Vowel letters in English are 'a', 'e', 'i', 'o', and 'u'.
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