Definition: Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.
Input: THEM: one of each  YOU: i need the book and a hat, you can have the rest  THEM: no deal  YOU: ok, just the book for me  THEM: no deal  YOU: you can't give up the book?  THEM: no  YOU: well then no deal  THEM: hit the no deal buton we both get paid  YOU: hasn't popped up yet.
Output:
No