Amy: We wrote you a special thank you note.
Leonard: Oh.
Penny: Are those words?
Sheldon: No. It's a secret code that you two get to figure out together.
Amy: Hint: it's based on Sanskrit, but not the Sanskrit you're thinking of. (laughs)
Sheldon: And best of all, you can't use the Internet to cheat.
Amy: Because we locked you out of your Wi-Fi, and the answer to this is your new password.
Leonard: I'm no longer happy.