keyboard-row.md

<p>Given a List of words, return the words that can be typed using letters of <b>alphabet</b> on only one row&#39;s of American keyboard like the image below.</p>

<p>&nbsp;</p>

<p><img alt="" src="https://assets.leetcode.com/uploads/2018/10/12/keyboard.png" style="width: 100%; max-width: 600px" /></p>
&nbsp;

<p><b>Example:</b></p>

<pre>
<b>Input:</b> [&quot;Hello&quot;, &quot;Alaska&quot;, &quot;Dad&quot;, &quot;Peace&quot;]
<b>Output:</b> [&quot;Alaska&quot;, &quot;Dad&quot;]
</pre>

<p>&nbsp;</p>

<p><b>Note:</b></p>

<ol>
	<li>You may use one character in the keyboard more than once.</li>
	<li>You may assume the input string will only contain letters of alphabet.</li>
</ol>