Ernie (spoken): Hi there. Ernie here. And now, we'll have Professor Hastings lecture us on the next letter of the alphabet: the letter U. Uhhhh, professor? Professor: Huh?! Huh?! Ah, yes. Good day. (sung) U is for underpass, U is for underwear, U is for... uhhh... uuhh... (falls asleep) (alarm clock rings) Ernie (spoken): Up, professor! Professor: Huh?! Huh?! Uhm... (sung) U is for upper plate, U is for undulate, U is for... uhhhh... uhh... (falls asleep) (alarm clock rings) Ernie: (spoken) Up, professor! Professor: Huh?! Huh?! (sung) One straight line going down and smoothly curving 'round And heading straight up the other way U is unusual U is unquestionably The start of USA (spoken) Which began when the United States... uhmm... united... that's another U word. (sung) As is unicorn Ukulele, uniform and U also sounds like Uncle... umbrella... umpire... uhmm... (falls asleep) (alarm clock rings) Ernie: Up, professor, up! Professor: Huh?! Huh?! Who?! Ernie: U!
https://primanota.net/sesame-street/the-u-lecture-lyrics.htm