Thanks to the Way Back Machine, I found the perl sigs that I wrote while avoiding doing work on my Latin PhD in the years 2000 and 2001 AD.
I have no idea if these still work with anything other than Perl 4 or whatever it was at the time. I also have no idea how to write perl anymore. But I was addicted to playing games with it at the time. You could write beautiful numerical and lexical puzzles and poems with that crazy language. It was so much fun to explore with. And the Perl Journal was awesome.
':2F5D)W,@86YO=&AE<B!P97)L(&AA8VME<@H'=~/.*/&& print unpack ("u",$&);