Decode the string with the number of letter repeation : <p>I have a string "<strong>3A4B2GEF</strong>", need to decode it to "<strong>AAABBBBGGEF</strong>". If there is no number before letter, <strong>it means that repeat = 1</strong>. But in the output the maximum letters of string is 30, example "29A3B" output is:</p>

<pre><code>AAAAAAAAAAAAAAAAAAAAAAAAAAAAAB
BB
</code></pre>
