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

my @month_names = qw( January February March April May June July
                      August September October November December );
for my $start (0 .. 11) {
    for my $month ($start .. 11 + $start) {
        print $month_names[ $month % 12 ], ' ';
    }
    print "\n";
}