i was watching "Company Man" and i was wondering if....?

ok i was wondering if anyone remembers the ano of beethoven's piano sonata that was refered to in "Company Man". from the episode i remember mozzie looked and the sheet música in Diana's bag and i dident catch what it said. but later mozzie said that it was beethoven's piano sanata then he said a ano and i cant remember what it was if anyone remember or can find out the information would be greatly aprecated. if that was kinda confusing just tell me and i'll try to refrase it.