an> <span class="number">800</span><span class="special">)</span>
            <span class="special">(</span><span class="string">"CM"</span>   <span class="special">,</span> <span class="number">900</span><span class="special">)</span>
        <span class="special">;</span>
    <span class="special">}</span>

<span class="special">}</span> <span class="identifier">hundreds</span><span class="special">;</span>
</pre>
<p>
        </p>
<p>
          Here's a parser for roman tens (10..90):
        </p>
<p>
</p