50</span><span class="p">]],</span>
                   <span class="n">node_to_label</span> <span class="o">=</span> <span class="p">{</span><span
                                    class="mi">0</span><span class="p">:</span><span class="s1">&#39;A&#39;</span><span
                                    class="p">,</span><span class="mi">1</span><span class="p">:</span><span class="s1">&#39;B&#39;</span><span
                                    class="p">,</span><span class="mi">2</span><span class="p">:</spa