span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">2</span><span class="w"> </span><span class="p">,</span><span class="w"> </span><span class="n">N</span>
<span class="w">               </span><span class="k">IF</span><span class="w"> </span><span class="p">(</span><span class="w"> </span><span class="n">X</span><span class="p">(</span><span class="n">i</span><span class="p">)</span><span class="o">/=</span><span class="n">hold</span><span class="w"> </span><span class=