Shroeder, Lucy and Beethoven scene

man . please someone answer. in the lucy and shroeder clip, I'm missing one of the Beethoven pieces, I don't have the cartoon handy but from what I recall I think it's the last one he plays before laughing hillariously and leaving the room -they were chatting about some combination ?-

If correctly recall, he plays hammerklavier, waldestein, pathetique, and then he plays this one that I can't remember !