Definition: Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.
Input: THEM: ok, i want 10 books, you can have the rest, final deal  YOU: how about no. you can give me 1 book. and i want 2 balls as well.  THEM: k bye. i'm only taking 1 book  YOU: okay i will give you two hats for the 1 book  THEM: we are both wasting our time  YOU: yeah then accept it. two hats and give me the book  THEM: i want the book. i don't even get any points for it.  YOU: no i want the book, you can have all the balls  THEM: i've done these hits a million times. you get the bonus either way  YOU: fine take the book but i want all the balls and hats.
Output:
Yes