class="op">(</span><span class="fl">4</span>, <span class="op">-</span><span class="fl">12</span>, <span class="op">-</span><span class="fl">4</span>,</span></span>
<span class="r-in"><span>              <span class="fl">2</span>,   <span class="fl">1</span>,  <span class="fl">3</span>,</span></span>
<span class="r-in"><span>             <span class="op">-</span><span class="fl">1</span>,  <span class="op">-</span><span class="fl">3</span>,  <span class="fl">2</span><span class="op">)</span>, <span class="f