val</span>&nbsp;string_before&nbsp;:&nbsp;string&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;string<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;string_after&nbsp;:&nbsp;string&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;string<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;first_chars&nbsp;:&nbsp;string&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int&nbsp;<span class="key