ntifier">first_name</span><span class="special">.</span><span class="identifier">size</span><span class="special">()</span> <span class="special">*</span> <span class="number">2</span> <span class="special">+</span> <span class="number">1</span> <span class="special">+</span>
      <span class="identifier">x</span><span class="special">.</span><span class="identifier">last_name</span><span class="special">.</span><span class="identifier">size</span><span class="special">();</span>
  <span class="special">}<