#!/usr/bin/perl

my @a, %hash;
my $file = shift;
open(list, "< $file") or die;
chomp( @a=<list> );
close(list);
@hash{@a}=@a;

$/ = "";

# Example data
#
# $ cat hash
#  PP22x43@.5
# $ cat data
#  \n
#  Random lines
#  PORNUM: PP22x43@.5
#  Random lines
#  \n
#  Random lines
#  PORNUM: PC12x120/25

while (<>) {

## manual test #  print if !m/PORNUM: PP22x43@.5/ms;

  print unless exists $hash{  }
}
exit(0);

##</code><code>##

PORNUM: PP22x43@.5
PORNUM: PC12x120/25

##</code><code>##

random lines of data
PORNUM: PC21x21!2
random lines of data

random lines of data
random lines of data
PORNUM: PP22x43@.5
random lines of data

PORNUM: PP12x60@1
random lines of data
random lines of data

random lines of data
PORNUM: PC12x120/25