--- /dev/null
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+
+use Pairwise;
+use blib;
+
+open my $f, "../tests/input" or die $!;
+my ($number, @distance) = Pairwise::pairwise($f);
+my @ids = splice @distance, 0, $number;
+
+print "$number, @ids, @distance\n";