#!/usr/bin/perl
use warnings;
use strict;

use Test::More;
use Benchmark qw{ cmpthese };

my @input = split /\n/, << '__INPUT__';
12-12
12-12-12
12-13-12-13
12-12-13-13
12-13-13-14
__INPUT__

sub lenno {
    my @back;
    my @i = @input;
    for (@i) {
        my %h;
        undef $h{$1} while s/(\d\d)//;
        push @back, join ("-", sort keys %h);
    }
    \@back
}


sub choro {
    my @back;
    my @i = @input;
    for (@i) {
        my %h;
        undef $h{$1} while m/(\d\d)/g;
        push @back, join ('-', sort keys %h);
    }
    \@back
}


is_deeply(lenno(), choro(), 'same');
done_testing();

cmpthese(-3,
         { lenno => 'lenno',
           choro => 'choro',
         });