pan><span class="p">())</span>
            <span class="n">f</span> <span class="o">=</span> <span class="p">{</span><span class="n">i</span><span class="p">:</span><span class="n">M</span><span class="o">-</span><span class="n">f</span><span class="p">[</span><span class="n">i</span><span class="p">]</span> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="n">f</span><span class="o">.</span><span class="n">keys</span><span class="p">()}</span>
            <span cla