THEM: ok how about you get two hats  YOU: i can take the two hats, but also want the ball  THEM: ok how about i give you three hats and call it even  YOU: no, still want the ball  THEM: ok then only the ball  YOU: the ball, a book and a hat  THEM: no book  YOU: 2 hats and a ball for me?  THEM: one hat.