</span>
<span class="w">         </span><span class="k">do </span><span class="n">i</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">2</span><span class="p">,</span><span class="n">n</span><span class="w"></span>
<span class="w">            </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="nb">abs</span><span class="p">(</span><span class="n">sx</span><span class="p">(</span><span class="n">ix</span><span class="p">)).<