s="p">(</span><span class="w"> </span><span class="n">ix1</span><span class="o">==</span><span class="n">ix0p1</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="k">THEN</span>
<span class="k">            </span><span class="n">Ppf</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">ix1</span>
<span class="w">            </span><span class="k">IF</span><span class="w"> </span><span class="p">(</span><span class="w"> </span><sp