Big Bird and Snuffy's notes

Bob and Big Bird are just about to go to the movies when Bob takes notice of Big Bird's clever note for Snuffy. Big Bird explains that if Snuffy goes looking for him, he'll see the note left, reading, "Dear Snuffy, Big Bird and Bob went to a." with Snuffy intending to show the word "back. Sponsors: Q, W, 3