an class="n">x1</span><span class="p">,</span> <span class="n">y1</span> <span class="ow">in</span> <span class="n">tidSetY</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
                <span class="k">if</span> <span class="n">x</span> <span class="o">==</span> <span class="n">x1</span><span class="p">:</span>
                    <span class="n">tids</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">x</span><span class=