 <span class="n">xyzr</span>
 
    <span class="n">Lt</span> <span class="o">=</span> <span class="n">labt</span><span class="p">[</span><span class="o">...</span><span class="p">,</span><span class="mi">0</span><span class="p">:</span><span class="mi">1</span><span class="p">]</span>
    <span class="n">at</span> <span class="o">=</span> <span class="n">labt</span><span class="p">[</span><span class="o">...</span><span class="p">,</span><span class="mi">1</span><span class="p">:</span><span class="mi">2</s