Definition: Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.
Input: THEM: i want one of each. YOU: i can give you 3 balls THEM: what will you give up a book for? YOU: i dont want to give up a book i need them both THEM: then can i take the balls as well as a hat? YOU: no THEM: then i will take three balls. YOU: okay deal.
Output:
Yes