<h2><a href="https://leetcode.com/problems/find-the-difference/">389. Find the Difference</a></h2><h3>Easy</h3><hr><div><p>You are given two strings <code>s</code> and <code>t</code>.</p>

<p>String <code>t</code> is generated by random shuffling string <code>s</code> and then add one more letter at a random position.</p>

<p>Return the letter that was added to <code>t</code>.</p>

<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>

<pre><strong>Input:</strong> s = "abcd", t = "abcde"
<strong>Output:</strong> "e"
<strong>Explanation:</strong> 'e' is the letter that was added.
</pre>

<p><strong class="example">Example 2:</strong></p>

<pre><strong>Input:</strong> s = "", t = "y"
<strong>Output:</strong> "y"
</pre>

<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>

<ul>
	<li><code>0 &lt;= s.length &lt;= 1000</code></li>
	<li><code>t.length == s.length + 1</code></li>
	<li><code>s</code> and <code>t</code> consist of lowercase English letters.</li>
</ul>
</div>