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# **Reverse Vowels of a String** Coding Challenge algorithm

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# **Reverse Vowels of a String**
Given a string `s`, reverse only all the vowels in the string and return it.
The vowels are `'a'`, `'e'`, `'i'`, `'o'`, and `'u'`, and they can appear in both lower and upper cases, more than once.
**Example 1:**
Input: s = "hello"
Output: "holle"
Given a string `s`, reverse only all the vowels in the string and return it.
The vowels are `'a'`, `'e'`, `'i'`, `'o'`, and `'u'`, and they can appear in both lower and upper cases, more than once.
**Example 1:**
Input: s = "hello"
Output: "holle"