">line</span> <span class="special">|</span> <span class="identifier">filtered</span><span class="special">(</span><span class="identifier">not_two</span><span class="special">()))</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>

    <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
<span class="special">}</span>
</pre>
<p>
          