reverse-vowels-of-a-string.md

<p>Write a function that takes a string as input and reverse only the vowels of a string.</p>

<p><strong>Example 1:</strong></p>

<pre>
<strong>Input: </strong><span id="example-input-1-1">&quot;hello&quot;</span>
<strong>Output: </strong><span id="example-output-1">&quot;holle&quot;</span>
</pre>

<div>
<p><strong>Example 2:</strong></p>

<pre>
<strong>Input: </strong><span id="example-input-2-1">&quot;leetcode&quot;</span>
<strong>Output: </strong><span id="example-output-2">&quot;leotcede&quot;</span></pre>
</div>

<p><b>Note:</b><br />
The vowels does not include the letter &quot;y&quot;.</p>

<p>&nbsp;</p>