On 11/29/2013 1:41 PM, Kenneth Brody wrote:
[...]
>> Plus only allow upto 01-31
[...]
> ( ( N N & "01"-"31" ) | <0> ("1"-"9") )
[...]
I leave it as an exercise to the reader as to why this would not suffice:
( ( "01"-"31" ) | <0> ("1"-"9") )
--
Kenneth Brody