In this task you are given a small conversation between two persons and 4 options on how the conversation should continue. Your job is to choose the most reasonable option. The conversation and the options are separated by a newline character. Each dialogue in the conversation are separated by a comma. F and M indicate female and male, respectively.

Ex Input:
F: Welcome to our restaurant. What kind of dishes would you like? Here's the menu for specialty. ,M: I like beggars chicken best but I am waiting for another 3 friends now.
(A) F: It's so nice of you to take your parents to dinner. (B) F: OK, I can take your order when your neighbors arrive. (C) F: I'm not surprised that your three other friends are going to the theatre instead of having a meal with you. (D) F: I didn’t hear you. Please could you tell me again?

Ex Output:
D


Ex Input:
M: I see you are busy now, Kate. Once you finish, I'd like to have a talk with you. ,F: Alright, come in please.
(A) M: I have time to help you with work. (B) M: I’m sorry, I don’t understand. Could you say it again? (C) M: I can see that you are not busy, so I want to have a talk with you. (D) M: I would like to have a talk with you.

Ex Output:
D


Ex Input:
M: I talked to fill it today, and he said he'd be coming to the party. ,F: Oh, so he can come after all.
(A) M: You must have known that Philip will go to the party with you. (B) M: I have met him at the party. (C) M: I’m sorry, I didn’t catch that. Would you mind speaking more slowly? (D) M: Philip has changed his plans. He said he'd be coming to the party.

Ex Output:

D