</span><span class="o">=</span><span class="mi">3</span><span class="p">):</span>
        <span class="c1"># TO DO: For now, start by assuming all words have len &gt;= 4. Fix later.</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">tokens</span> <span class="o">=</span> <span class="p">[</span><span class="n">t</span> <span class="k">for</span> <span class="n">t</span> <span class="ow">in</span> <span class="n">tokens</span> <span class="k">if</span> <span class="nb">len</sp