Very good job,
hypknotizzed! I see from your homenode that you are
in middle school, so I'm doubly impressed with your sleuthing skills.
The "fourth message" you found is, of course, very closely related to the "second message", even though it appears in the same context as the "third message". It took me a long time to figure out how to even produce the third message, but once that was working it was fairly easy to incorporate the "first message" as well.
@ARGV=split//,"/:L";
map{print substr crypt($_,ord pop),2,3}qw"PerlyouC READPIPE provides"
