/span>
<span class="sd">        &quot;&quot;&quot;</span>
        <span class="n">List</span> <span class="o">=</span> <span class="n">UList</span><span class="o">.</span><span class="n">elements</span>
        <span class="n">first</span> <span class="o">=</span> <span class="mi">0</span>
        <span class="n">last</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">List</span><span class="p">)</span> <span class="o">-</span> <span class="mi">1</span>
      