#!/usr/local/bin/perl 

$in_filename = "graph_set.out";
open (IN,"$in_filename") or die "Can't open $in_filename:$!\n";
local $/ = undef;   	# undef record seperator
my $string = <IN>;     	# read whole file into string    
close (IN);

my @gset_match = ($string =~ /([A-Z]\s\d+,\s\d+\(\s*\d+\))/g);

open (TEXT, ">graph_set.txt") or die "Can't create graph_set.txt: $!\n";
foreach $_(@gset_match) { print TEXT "$_\n"; }
close TEXT;