span><span class="p">(</span><span class="n">j</span><span class="o">+</span><span class="mi">1</span><span class="w"> </span><span class="o">&lt;</span><span class="w"> </span><span class="n">num_blocks</span><span class="p">)</span><span class="w"> </span><span class="n">node</span><span class="p">[</span><span class="n">i</span><span class="p">][</span><span class="n">j</span><span class="p">].</span><span class="n">precede</span><span class="p">(</span><span class="n">node</span><span class="p">[</span>