="o">.</span><span class="n">split</span><span class="p">()</span>
                <span class="k">if</span> <span class="n">iList</span><span class="p">[:</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span> <span class="o">==</span> <span class="n">jList</span><span class="p">[:</span><span class="o">-</span><span class="mi">1</span><span class="p">]:</span>
                    <span class="n">unionDiffSet</span> <span class="o">=</span> <span class="bp">self</span><span class="