Knock! Knock! Who’s there? Dozen…

Knock! Knock! Who’s there? Nun. Nun who? Nun of your business!

Knock! Knock! Who's there? Interrupting cow Interruptin- Mooooo!

Knock! Knock! Who's there? Pecan Pecan who? Pecan somebody your own size!

Knock! Knock! Who's there? Lettuce. Lettuce who? Lettuce in it's cold out here.

Knock! Knock! Who's there? Robin. Robin who? Robin you, now hand over the cash!