Hahaha... I remember my uncle struggling with that one forever! And then one day my aunt finally figured it out and told him, and he looked at her as if to say, "have you lost your mind?!"
Very hilarious memory!
As I remember, in the later years of the show that phrase was slowed down when it was sung so the words came across more clearly. I could be wrong about that, but that's the way I remember it.