Definition: Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.
Input: THEM: i will give you all the balls in exchange for the books and hat.  YOU: i could really use the books and the balls. i run a preschool and could use those items.  THEM: that wouldn't work for me. i can give you both books in exchange for the balls and the hat.  YOU: i wanted the balls also.  THEM: i understand what you want, but we're trying to reach a compromise. do you ahave a better offer?  YOU: i will give the hat in exchange for the books and the basketballs.  THEM: no deal ; i'm losing out completely with that.  YOU: how is that? it is a completely even trade.  THEM: our point values are quite different, i assume. i will compromise on 1 book and 1 hat, leaving the rest to you.
Output:
Yes