ss="computeroutput"><span class="identifier">a</span> <span class="special">|</span>
                      <span class="identifier">b</span></code>
                    </p>
                  </td>
<td>
                    <p>
</p>
<pre class="table-programlisting"><span class="identifier">a</span><span class="special">:</span> <span class="identifier">A</span><span class="special">,</span> <span class="identifier">b</span><span class="special">:</span> <span class="identifier">B</span> <span class="special"