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.

Example Input: M: Professor White, I'd like to have your advice on my article. ,F: It's good except for some spelling mistakes. What's more, the second paragraph is about another topic. It should be crossed out.
(A) M: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (B) M: People will have a bad first impression of you since your handwriting is so poor. (C) M: The level of a man's speech has nothing to do with his level of writing articles. (D) M: Thank you. I will take out the second paragraph that is not related to the article.
Example Output: D

Example Input: M: Excuse me, can I join the library? ,F: Are you a student of our college? ,M: No, I'm not. But I hear that it's open to the public. ,F: That's right. ,M: OK. Does it cost anything to join? ,F: Well, it's free for students of our college while it is 125 pounds per year or 35 pounds per quarter for the public.
(A) M: I am really sorry, I did not catch that. Would you slow down, please? (B) M: That means if I pay by year, it will save me 15 pounds a year. Sounds good. (C) M: Wow, that will save me 25 pounds if I pay by month! That's a real bargain. (D) M: Sounds good! I just pay 35 pounds for the whole year! I'd like to join this library.
Example Output: B

Example Input: M: I just want tickets to go see a live video taping of doctor Phil and Los Angelus. Do you want to go with me? ,F: Who is doctor Phil? ,M: You don't know who doctor Phil is? I watch him on TV every day. He's the host of a popular television show. He helps people get through life's most difficult situations. It's a great show, you should watch it.
(A) F: I'm sorry, I didn't understand. Could you repeat a little louder, please? (B) F: So, you mean it's not a great show? Dr. Phil is my doctor and he is great. (C) F: OK, I see. You never watch him on TV but you know Dr. Phil is a TV host. (D) F: OK, I see. Dr. Phil is a TV host of a popular television show.
Example Output:
D