use strict;
use warnings;
use Data::Dumper;
my ($file1 ,$file2,$file3)= @ARGV;

open(my $fh, '>', $file3) or die $!;

#reading file1 into a hash

my %hash;
my @fields;
open( my $fh1, '<', $file1 ) or die $!;
while ( my $line = <$fh1> ) {
    chomp $line;

    next if $line =~ /^\s*$/;
    $line =~ s/^\s+|\s+$//g;
    $hash{$line} = 1;
}

#print Dumper(\%hash);

close $fh1;

open( my ($fh2), $file2 ) or die $!;

while ( my $row = <$fh2> ) {
    chomp $row;

    #print "$row\n";
    next if $row =~ /^\s*$/;
    $row =~ s/^\s+|\s+$//g;
    my (@fields) = split( /\|/, $row );

   # print "$fields[0]\n ";

    if ( exists $hash{ $fields[0] } ) {
        print $fh  "$row\n";
    }
}
close $fh;
close $fh2;