Definition: Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.
Input: THEM: ill give you 1 book and 1 ball  YOU: add another ball and we call it the  THEM: how about i give you 2 balls and keep the rest  YOU: what about the book deal  THEM: ill give 2 balls and the book  YOU: deal.
Output:
Yes