n class="k">if</span><span class="w"> </span><span class="p">((</span><span class="n">m</span><span class="p">.</span><span class="n">eq</span><span class="p">.</span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="p">.</span><span class="nb">or</span><span class="p">.</span><span class="w"> </span><span class="p">(</span><span class="n">n</span><span class="p">.</span><span class="n">eq</span><span class="p">.</span><span class="mi">0</span><span class="p">)</span><spa