#!/usr/bin/perl

# stUdLy cAPs, after emacs studly.el -- the commented line is just
# to remind diehards how it *should* be done ;)
#
# just for reference, you may do whatever you like with this file.
#
# -- nwp@lemon-computing.com

for (my $offset = 0; defined(my $c = getc); $offset++) {
#    (($c + $offset) % 4) == 2 and print (ord($c) ^ 32) or print($c);
    (($c + $offset) % 4) != 2 and print($c) or $c =~ tr/[A-Za-z]/[a-zA-Z]/, print $c;
}