open(LOG, "source2.txt") or die "Error: $!";
my @lines = <LOG>;
close(LOG);

foreach my $line (@lines)
{
   $line =~ m/(.+)\s+(\d+),\s+(\d+)\s+(\(Birthday\) .+)/;
    print "$1    $2    $3   $4\n";

    open(OUT, ">> $1/$2.txt") or die "Error";
    print OUT "\n$3 $4";
}

print "Done";