#!/usr/local/bin/perl
$b=sprintf("%02X",ord("\n"));while(<DATA>)
{s/$b.*/$b/g;(split(//,$_));@a=();while(
$#_>-1){$_=shift(@_);$_.=shift(@_);if(
/G([0-9])/){for$i(2..int($1)){foreach$l
(reverse(@a)){unshift @_,$l;}}$_="";}else{
print chr(hex($_));}@a=split(//,$_);p}}
__END__
20G72E2D22G22D2E5FG220G30A20G52E2D22G32D22
20G52F2020G427206F275C200A20G52E2D22G32222
20G22C2D3B20G2272E20G23A20G35F630A20G52E2D
203A5F2E225C2E5F2029203AG22D2220G20A20G52E
20G822G26D20226D20G30A20G52E2D22G32D220G52