Definition: Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.
Input: THEM: what would you like  YOU: the hat and the ball  THEM: i will take the ball and 3 books  YOU: if i give you the ball i will need 3 books.  THEM: do i get the hat?  YOU: no  THEM: that doesnt work i would end up negative,. i will do the ball and 2 books  YOU: fair enough  THEM: deal.
Output:
Yes