wire  [130 : 0]         dgrs;
wire  [130 : 0]         dgrs;
wire  [130 : 0]         dgrs;

wire  [130 : 0]         grs;
wire  [130 : 0]         grs;
wire  [130 : 0]         grs;

##</code><code>##

wire  [130 : 0]         dgrs_1;
wire  [130 : 0]         dgrs_2;
wire  [130 : 0]         dgrs_3;

wire  [130 : 0]         grs_1;
wire  [130 : 0]         grs_2;
wire  [130 : 0]         grs_3;

##</code><code>##

#!/usr/bin/perl
use strict;
use warnings;
my $file = 'xyz.txt';
my %seen = ();
{
   local @ARGV = ($file);
   local $^I = '.bac';
   while(<>){
      $seen{$_}++;
      next if $seen{$_} > 1;
      print;
   }
}

print "finished processing file.";




my $target_file = 'xyz.txt';

{
    open my $in_fh, '<', $target_file or die "Cannot open input file: $!\n";
    flock $in_fh, LOCK_EX | LOCK_NB or die "Cannot obtain a lock on $target_file: $!\n";

    my $temp_out = File::Temp->new(TEMPLATE => "$0-$$-XXXXX");

  
 while ( my $line = <in_fh> ) {
    if ( $line =~ /^dgrs/ ) {
        for my $x (1..3) {
            print "dgrs$x\n";
        }
    }
    else {
        print $line;
    }
}


    
    close $in_fh or die "Failed to close $target_file. Aborting. $!\n";

    $temp_out->flush;
    eval {
        move($temp_out->filename, $target_file);
    } or do {
        warn "Failed to swap $temp_out into $target_file: $!\n";
        # There may need to be more cleanup here, or possibly a die is more appropriate.
    };
}