345. Reverse Vowels of a String
https://leetcode.com/problems/reverse-vowels-of-a-string/
Write a function that takes a string as input and reverse only the vowels of a string.
Example 1:
Input: "hello" Output: "holle"
Example 2:
Input: "leetcode" Output: "leotcede"
Note:
The vowels does not include the letter "y".
The vowels does not include the letter "y".
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