Lowering spam Subjects ending like: [ ]+[0-9]+$

[Chris Shenton <cshenton@OutBounderInc.com>]

Seems there has been some spam software out there that sends mail with
a subject then appends a bunch of spaces and then some presumably
unique tracking number to the end, like:

        Don't miss this $700 Give Away                         15817

Is there a way to get Gnus to recognize these (preferably in all
groups) and lower their score so I can skip over them? I've been doing
it manually for each one I see with gnus-summary-lower-score (L S) and
it's getting tiresome with the increase in spam.

My emacs regexp skills aren't stellar but I should be able to figure it out
if I know where to begin. Looking for a pattern that ends with (say)
16 or more spaces then 4-6 digits, then the end of line.

Thanks.