b">enumerate</span><span class="p">(</span><span class="nb">sorted</span><span class="p">(</span><span class="nb">set</span><span class="p">(</span><span class="n">text</span><span class="o">.</span><span class="n">lower</span><span class="p">())))}</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><span class="n">keys</span><span class="p">())</span>
<span class="nb">print</span><span class="p">(<