Knock Knock
Who's there?
Cello!
Cello who?
Cello dere!

Knock Knock
Who's there?
Cereal!
Cereal who?
Cereal pleasure to meet you!

Knock Knock
Who's there?
Chad!
Chad who?
Chad to make your acquaintance!

Knock Knock
Who's there?
Cheese!
Cheese who?
Cheese a cute girl!

Knock Knock
Who's there?
Cher!
Cher who?
Cher and share alike!