an class="o">=</span> <span class="p">{}</span>
        <span class="n">utility</span> <span class="o">=</span> <span class="mi">0</span>     

        <span class="n">added</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span>

        <span class="n">item</span> <span class="o">=</span> <span class="n">beta</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span>

        <span class="n">temp</span> <span class="o">=</span> <spa