Knock Knock
Who's there?
Fred!
Fred who?
Fred Badge of Courage!

Knock Knock
Who's there?
Frederick!
Frederick who?
Frederick Express!

Knock Knock
Who's there?
Freddie!
Freddie who?
Freddie or not here I come!

Knock Knock
Who's there?
Freighter!
Freighter who?
Freighter open the door!

Knock Knock
Who's there?
Fresno!
Fresno who?
Rudolf the Fresno reindeer...!