>  <span class="va">z</span>,</span>
<span>  <span class="va">w</span>,</span>
<span>  <span class="va">xg</span>,</span>
<span>  <span class="va">yg</span>,</span>
<span>  <span class="va">xgl</span>,</span>
<span>  <span class="va">ygl</span>,</span>
<span>  <span class="va">xr</span>,</span>
<span>  <span class="va">yr</span>,</span>
<span>  gamma <span class="op">=</span> <span class="fl">0.5</span>,</span>
<span>  iterations <span class="op">=</span> <span class="fl">2</span>,</span>
<span>  trim <span