Sirius: Okay, I have a riddle for you, Remus.
Remus: Okay?
Sirius: There's a table with four people that are supposed to sit there, but they have no idea where. There is you, me, Mary and Will.
Sirius: In what order are they supposed to sit?
Remus: I don't know. Me, Mary, You, Will?
Sirius: Nope, try again.
Remus: Um, how about. Will, You, Mary, me?
Remus: Oh, wait a second...
Sirius: I thought you'd never ask!