#!/usr/bin/perl
use strict;
use warnings;

my ($f1,$f2,@patterns,%patts,$f2_rec,$f2_field);
$f1 = $ARGV[0];
$f2 = $ARGV[1];
open(PATT,"<", $f1) or die;
@patterns = <PATT>;
chomp(@patterns);
close(PATT) or die;
@patts{@patterns} = (1) x @patterns;

open(FILE,"<", $f2) or die;
while (defined ($f2_rec = <FILE>))
{
    chomp $f2_rec;
    $f2_field = (split(/ /,$f2_rec))[0];
    if(exists($patts{$f2_field}))
    {
    print "$f2_rec\n";
    }
}
close(FILE) or die;