# **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"
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