use Lingua::EN::Inflect qw/inflect NUM PART_PRES/;
use Lingua::Conjunction qw/conjunction/;

my @gift = ( '',
  'partridge in a pear tree', 'turtle dove', 'French hen', 'calling bird',
  'gold ring',                'goose',       'swan',       'maid',
  'lady',                     'lord',        'piper',      'drummer',
);

my @action = map {$_ && PART_PRES $_} ( '',
    '',         '',         '',         '',
    '',         ' a-lay',   ' a-swim',  ' a-milk',
    ' dance',   ' a-leap',  ' pipe',    ' drum',
);

for my $day( 1..12 ) {
  print inflect("On the NUMWORDS(ORD($day)) day of Christmas,\n"),
        "my true love gave to me:",
        conjunction(
          map { NUM($_); inflect "\n\tA(PL_N($gift[$_]))$action[$_]"}
            reverse 1..$day
        ), ".\n\n";
}