                                   <span class="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>
                      