><span class="n">append</span><span class="p">(</span><span class="n">key</span><span class="p">)</span>
        <span class="c1"># for x, y in self._diffSets.items():</span>
        <span class="c1">#     print(x, y)</span>
        <span class="n">uniqueItem</span><span class="o">.</span><span class="n">sort</span><span class="p">()</span>
        <span class="c1"># print()</span>
        <span class="k">return</span> <span class="n">uniqueItem</span>

    <span class="k">def</span> <span class="nf">_runDe