<p>In order to <strong>add</strong> a letter, Alice has to <strong>press</strong> the key of the corresponding digit <code>i</code> times, where <code>i</code> is the position of the letter in the key.</p>
<ul>
<li>For example, to add the letter <code>'s'</code>, Alice has to press <code>'7'</code> four times. Similarly, to add the letter <code>'k'</code>, Alice has to press <code>'5'</code> twice.</li>
<li>Note that the digits <code>'0'</code> and <code>'1'</code> do not map to any letters, so Alice <strong>does not</strong> use them.</li>
</ul>
<p>However, due to an error in transmission, Bob did not receive Alice's text message but received a <strong>string of pressed keys</strong> instead.</p>
<ul>
<li>For example, when Alice sent the message <code>"bob"</code>, Bob received the string <code>"2266622"</code>.</li>
</ul>
<p>Given a string <code>pressedKeys</code> representing the string received by Bob, return <em>the <strong>total number of possible text messages</strong> Alice could have sent</em>.</p>
<p>Since the answer may be very large, return it <strong>modulo</strong><code>10<sup>9</sup> + 7</code>.</p>
