Knock! Knock! Who’s there? Mustache…

Knock! Knock! Who's there? Me. Me who? Having an identity crisis, are you?

Knock! Knock! Who's there? Europe Europe who? No, you're a poo!

Knock! Knock! Who's there? Alpaca. Alpaca who? Alpaca the trunk, you pack the suitcase.

Knock! Knock! Who's there? Yah. Yah who? No thanks, I use Bing or Google.

Knock! Knock! Who's there? Yukon. Yukon who? Yukon say that again!