Given the task definition and input, reply with output. Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.

THEM: hey, i want a hat and a book  YOU: hi! i can give a hat, but i really need the single book, but will give the ball.  THEM: i need the book. everything is yours except the book?  YOU: i will concede the book only then.

Yes