#!/usr/bin/env perl -l

use strict;
use warnings;
use autodie;

use Graph::Undirected;

my $graph = Graph::Undirected::->new();

open my $input_fh, '<', './pm_graph_undirected.txt';

while (<$input_fh>) {
    my ($x, $y) = /^\w+[#]([^<]+)\s+<=>\s+(.*)$/;
    
    $graph = $graph->add_edge(split /,/) for glob join ',' =>
        map { '{' . join(',' => split /[+ ]+/ => $_) . '}' } ($x, $y);
}   

print $graph;