"l00007"></a><span class="lineno">    7</span>              <a class="code hl_function" href="group__group__string.html#ga8138bcb734cadd41bccf9966556cdf4e">is_letter</a></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span>    </div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno">    9</span>    <span class="keyword">contains</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span>    </div>
<div class="fo