Instructions: Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.
Input: THEM: i'll let you have everything else if i can have the hat and 1 ball.  YOU: not possible, i need both balls and all books if you take the hat  THEM: i need a ball. i lost one in 'nam.  YOU: then take the balls and give me the hat and the books  THEM: ok.
Output:
Yes