s="special">---+--------</span>            <span class="special">---+------------</span>  
                                   <span class="identifier">s</span>  <span class="special">|</span> <span class="identifier">s</span>   <span class="identifier">s</span>              <span class="identifier">S</span>  <span class="special">|</span> <span class="identifier">S</span> <span class="identifier">S</span>     <span class="identifier">S</span>    
                                   <span class="identifier">m