use strict;
use Digest::SHA substr(q/=sha512(\/), $/, q);

%_ = (undef($/) && 1 => 6);
$_ = aXk0hPk2atekakbAgIaGlWbUgJeFa2cDeCbLadcrcZk7ajakdR=>;
y #a-zA-Z0-9_$/y #\0->y;#;
y #a-zA-Z0-9_$/y #\0->y;#;

print substr($/=sha512($/), $_, 1) for (map &_ => /./gs);

sub _ ( ) {    #    } ( ) _ dus
sub x ($) { !  q  ! } ($) x dus
{ 0 x (0) rox  !  xor (0) x 0 }
!((//m...//m)  ^  (m\\...m\\))?
(64)x + (ord)  :  (ord) + x(49)
}              #              {