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:
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: Hi, miss. Could you tell me where Mr. Johnson's office is? ,F: Well, his office is on the twenty second floor, but the lift only goes to the eighteenth floor. So you'll have to walk the rest of the way. ,M: Thank you very much.
(A) F: You have to walk the rest three floors to get Mr. Johnson's office. His office is on the twenty second floor. (B) F: You have to walk the rest four floors to get Mr. Johnson's office. His office is on the twenty second floor. (C) F: You have to walk the rest three floors to get Mr. Johnson's office. His office is on the twenty third floor. (D) F: Excuse me, could you repeat the question?

Ex Output:
B


Ex Input:
F: Have you got any idea what you'll buy for Mary's birthday? ,M: Well, I think I'll get her a new pen and I promised her that I take her to a film. What about you? ,F: Oh, I haven't decided yet. I'll probably buy her a new music record as she likes music so much.
(A) M: Why do you buy her a pen? (B) M: Why do you buy her movie ticket? (C) M: I’m sorry, I didn’t understand. Could you repeat a little louder, please? (D) M: A music record is the best gift for her. You are so smart.

Ex Output:

D