</span><span class="n">where</span><span
            class="p">,</span> <span class="n">suc</span><span class="o">=</span><span class="n">suc</span><span
            class="p">)</span>
        <span class="k">if</span> <span class="n">suc</span><span class="o">.</span><span class="n">left</span><span
            class="p">:</span>
            <span class="nb">print</span><span class="p">(</span><span class="s2">&quot;Noeud left a dejà un voisin, bizarre&quot;</span><span
            class="p">)</span>
    