[MUSIC PLAYING] GROUP: (SINGING) Ba, ba. Ba, ba. Ba. Ba, ba. Ba. Ba. 

SPEAKER 1: (SINGING) It's the first day of class. And I'm brand new to code. Is this for me? So many people around. Can I get through the workload? But it's my dream. I tend to stick to English, not Science. But my [INAUDIBLE] friends told me to try this. Hey, dancing robot dog. You kind of look like you have your life together, I guess. I really need some advice. 

GROUP: (SINGING) We know you're feeling unsure that this is really the right call. In CS50, you'll meet new friends, get free food. You'll be all set for this fall in CS50. You have 1,000 TR's here to help you. You'll get cupcakes, duckies, Chinese food. And you can always take this class as Sat, Unsat. 

SPEAKER 1: This is CS50. Fist bump. 

[LAUGHTER] 

[APPLAUSE]