https://leetcode.com/problems/maximum-number-of-vowels-in-a-substring-of-given-length/description Maximum Number of Vowels in a Substring of Given Length - LeetCode Can you solve this real interview question? Maximum Number of Vowels in a Substring of Given Length - 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..