an> <span class="o">&amp;&amp;</span> 
    <span class="n">g</span><span class="p">[</span><span class="n">left</span><span class="p">]</span> <span class="o">&amp;&amp;</span> <span class="n">left</span> <span class="o">!=</span> <span class="n">g</span><span class="p">[</span><span class="mi">0</span><span class="p">][</span><span class="mi">0</span><span class="p">]</span> <span class="p">)</span> <span class="p">{</span>
    <span class="k">return</span> <span class="nb">true</span><span class="p">;</sp