Definition: Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.
Input: THEM: i want one of each.  YOU: is the ball of high value for you?  THEM: somewhat, but if you want the ball, you can have that. and i'll take only the hat.  YOU: that's my dilemma, how about i take hat, you take the ball and 3 books?  THEM: ok.
Output:
No