#!/usr/bin/perl -w
use strict;
open (IN, ARGV[0]);
my %assem = ();
while(my $line = <IN>){
        chomp $line;
        my @parseblast = split(/\s+/, $line);
        $parseblast[0] =~ s/\s+//g;
        $parseblast[1] =~ s/\s+//g;
        print $parseblast{0}."\n";
        $assem{$parseblast[0]} = $parseblast[1];
}
close IN;

open(IN, $ARGV[1]);
my %clc = ();
while(my $line = <IN>){
        chomp $line;
        my @assemblast = split(/\s+/, $line);
        $assemblast[0] =~ s/\s+//g;
        $assemblast[1] =~ s/\s+//g;
        print $assemblast[0]."\n";
        $clc{$assemblast[0]} = $assemblast[1];
}
close IN;

my $c=0
while(my $k = each(%assemblast)){
        if($clc{$assemblast{$k}} eq $k){
        $ c++;
        }
}
print $c;