an><span class="p">(</span><span class="n">t</span><span class="p">)</span> <span class="o">&gt;=</span> <span class="mi">4</span><span class="p">]</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">c2i</span> <span class="o">=</span> <span class="n">c2i</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">i2c</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">c2i</span><span class="o">.</span><spa