ass="special">|</span> <span class="identifier">S</span> <span class="identifier">S</span>     <span class="identifier">S</span>
<span class="identifier">m</span>  <span class="special">|</span> <span class="identifier">m</span>   <span class="identifier">m</span>              <span class="identifier">M</span>  <span class="special">|</span> <span class="identifier">M</span> <span class="identifier">M</span>     <span class="identifier">M</span>
</pre>
<p>
      </p>
<p>
        and another part that provid