#!/usr/bin/perl

use strict;
use warnings;

use Getopt::Long;

GetOptions(
     'FileIn=s'  => \my $fileIn,
     'FileOut=s' => \my $fileOut,
  );

if ($fileIn && $fileOut) {
    open(INPUT,"<","$fileIn");

    my $entry = "";
    while (<INPUT>) {
        next if /^\n/;
        
        if (/^HEADER/ .. /^\)/) {  # flip-flop
            $entry .= $_;          # accumulate input
        }
        if (/^\)/) {               # end of entry
            # check for desired type of entry
            if ($entry =~ /^HEADER(.*?)^\s*GENRE_BY(.*)/sm) {
                print $entry;
            }
            $entry = "";           # reset accumulator
        }
    }
}