On 19/01/06, Eric Luo <eric.wenbl / gmail.com> wrote:
> In your solution:
>
>   <SNPB>  <foo SNPB>  <SNPB bar>  <foo SNPB bar> matched.
>
> But "STR bla SNPB " will also be matched, which is not expected.
>
> I really appreciate your help. Thanks
>

Then the lookbehind assertion would not have worked either. (?<!A)B
says "Match any B that is not *immediately* preceded by an A.

Regards,
Stefan