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

THEM: i'd like hat and book. YOU: hat and book are the only points for me. i'm willing to split this down the middle somehow, but balls are no use to me. THEM: then i'll take balls and either hat or ball. YOU: hat is a little higher for me... i'll take hat you take book and balls? THEM: deal.
Yes