/span> <span class="n">ll</span><span class="o">.</span><span class="n">left</span><span
            class="p">:</span>
        <span class="n">ll</span> <span class="o">=</span> <span class="n">ll</span><span class="o">.</span><span
            class="n">left</span>

    <span class="c1"># We concat the induced euler tour</span>
    <span class="c1"># Maximum of first tree with minimum of second tree</span>
    <span class="n">rl</span><span class="o">.</span><span class="n">suc</span> <span class="o">=</s