Definition: Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.
Input: THEM: id like both balls and a hat  YOU: that doesn't work for me, i'd need three items total to be even marginal (everything is worth 2 to me)  THEM: we have a similar problem... i need both balls and a hat... the book is meaningless  YOU: then no deal, sorry, just works that way sometimes  THEM: ok, i will go with two balls,,, you can have the rest  YOU: i can do that  THEM: deal.
Output:
Yes