#!/usr/bin/perl -w
use strict;
use warnings;
use Data::Dumper;
#kaks üheveerulist faili, prindib need veerud mis ühes on aga teises pole
#ehk siis suurem fail miinus väiksem
my $num_args = $#ARGV + 1;
if ($num_args != 3) {
  print "\nUsage: ./lahutaja suurem väiksem vahe(output)\n";
  exit;
}
my $f=$ARGV[0];
my $qa=$ARGV[1];
my $out=$ARGV[2];
open  FA, "< $f"or die "Can't open $f: $!";
open  QA, "< $qa" or die "Can't open $qa: $!";
open  OUT,"> $out" or die "Can't open $out: $!";



my @bl = <QA>;
my @a = <FA>;
my %h;

@h{@bl} = @bl;
my @output=grep {!exists $h{$_}} @a;

print "\@bl:    [ @bl ]\n";
print "\@a:     [ @a ]\n";
print "\@output:[ @output ]\n";
print OUT  @output;

close FA;
close QA;
close OUT;