Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.

Ex Input:
THEM: i would love the ball you can have the rest  YOU: ok.

Ex Output:
Yes


Ex Input:
THEM: i would really like the basketball.  YOU: i get 0 balls 1 hat and 2 books  THEM: deal.

Ex Output:
Yes


Ex Input:
THEM: i'll take all the items.  YOU: amusing... all hats for me, ball and book for you  THEM: i'll take the ball, the book and 1 hat.  YOU: subtract any one of those and we're done  THEM: ok, i'll take the ball and 1 hat.  YOU: deal.

Ex Output:

Yes


