Knock knock. Who's there? Isabelle.

Isabelle who? Isabelle necessary, or can I just walk right in?

Knock knock. Who's there? Alpaca.

Alpaca who? Alpaca the suitcase, we're going on vacation!

Knock knock. Who's there? Dew.

Dew who? Dew-n't worry, it's just a drop in.

Knock knock. Who's there? Flake

Flake who? Snow-body's home.