ss="n">X</span><span class="w"> </span><span class="p">,</span><span class="w"> </span><span class="n">xdel</span><span class="w"> </span><span class="p">,</span><span class="w">    </span><span class="p">&amp;</span>
<span class="w">     </span><span class="p">&amp;</span><span class="w">     </span><span class="n">xmax</span><span class="w"> </span><span class="p">,</span><span class="w"> </span><span class="n">xmin</span><span class="w"> </span><span class="p">,</span><span class="w"> </span><span class=