>
     <td headers="matches">The end of the input but for the final
         <a href="#lt">terminator</a>, if&nbsp;any</td></tr>

 <tr><td valign="top" headers="construct bounds"><tt>\z</tt></td>
     <td headers="matches">The end of the input</td></tr>

 <tr><th>&nbsp;</th></tr>
 <tr align="left"><th colspan="2" id="greedy">Greedy quantifiers</th></tr>

 <tr><td valign="top" headers="construct greedy"><i>X</i><tt>?</tt></td>

     <td headers="matches"><i>X</i>, once or not at all</td></tr>
 <tr><td valign