pan><span class="t"><span class="str">                c2 = bottom-right</span>&nbsp;</span><span class="r"></span></p>
    <p class="pln"><span class="n"><a id="t55" href="#t55">55</a></span><span class="t"><span class="str">                c3 = bottom-left</span>&nbsp;</span><span class="r"></span></p>
    <p class="pln"><span class="n"><a id="t56" href="#t56">56</a></span><span class="t">&nbsp;</span><span class="r"></span></p>
    <p class="pln"><span class="n"><a id="t57" href="#t57">57</a></span><span 