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: F: Cindy, how are you getting along with the translation work? ,M: I have written and rewritten so much that I don't know if I'll ever get it finished.
(A) F: Don't be discouraged. Your translation can be done well. (B) F: I'm sorry, I don't understand. Could you say it again? (C) F: You are so satisfied with your translation work, right? (D) F: Don't feel so sad about that your written work is not good enough.
Example Output: A

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: Smith always seems to know other people's problems. ,F: That is true. I think that's why he has been so successful in his work.
(A) M: Smith never makes any mistakes. (B) M: Indeed. Smith is always the first to answer questions. (C) M: Smith has been observing other people's advantages and learning from them. (D) M: I didn't hear you. Please could you tell me again?
Example Output:
D