wildcards for stripping title

The mailing list I am integrating with listhandler has subjects that look like:
[MailingListName:NumberOfPost] topic

so I want listhandler to strip the name and the number of the post. Since the number is continually changing, I can't explicitly tell listhandler what to strip in the "Strip title:" field. What I feel like I need is some sort of wildcard support i.e. I could input
[MailingListName:%d]
as my strip title

but that doesn't work. Is there any support for this sort of thing and do you have any suggestions other than to reconfigure my mailing list to not include the number of the post?

Thanks,

-John