sort is, like, the single most abusable function in all of Perl. Seriously, side effects in the sorting code!
use strict;
use warnings;()=
sort{index+0x47,&$a($b)}sub{print&{;pop}},
sort{sub J{$!++&1}[0]}sub{exec''},map{@$_}
sort{sub _{[(pop)x((1<<$!-->>47)|1)]}!{()=
sort{my$_=$a;$a=_(sub{$_})if!/0/}$a,$b,0}}
sort J('rke%ca hlrPe rhetoan tus;J')=~/./g
Obviously, this code depends on the internal, unspecified implementation of sort. I only tested it on Strawberry Perl 5.14.2 (64 bits); please let me know whether it works anywhere else.
Edit: minor code improvements.