bsp;</tt></td>

     <td headers="matches">Any letter except an uppercase letter (subtraction)</td></tr>

 <tr><th>&nbsp;</th></tr>
 <tr align="left"><th colspan="2" id="bounds">Boundary matchers</th></tr>

 <tr><td valign="top" headers="construct bounds"><tt>^</tt></td>
     <td headers="matches">The beginning of a line</td></tr>
 <tr><td valign="top" headers="construct bounds"><tt>$</tt></td>

     <td headers="matches">The end of a line</td></tr>
 <tr><td valign="top" headers="construct bounds"><tt>\b</t