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: Hi jack, what did you think of the lecture you attended last night? ,M: Well, I should have stayed at home. And half of people had left before it was finished.
(A) F: Just a minute! I do not quite follow what you are saying, would you mind repeating that? (B) F: Yes, it is so moving! (C) F: Yes, the concert yesterday was really boring. (D) F: Why do you think it was boring?
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: F: Mister Williams, these days, David has been looking tired all the time. He has been falling asleep in class. I wonder if you should take him to see a doctor. ,M: Thanks, Miss Jones. I know what the problem is. He's recently been going to bed far too late. ,F: When does he go to bed? ,M: Usually around 11 o'clock. Sometimes even later. ,F: That's much too late. Can you help him get in bed earlier? Say around 9:30 or no later than 10 o'clock. ,M: We'll try. You know both David's mother and I often have to stay up late because of our work and recently David seems to have also got into our bad habit of going to bed late. ,F: Yes, but David has to get up very early for school. I'm really worried about his health and his studies. ,M: Yes, you're right. We'll try to change our habits to set a good example for David.
(A) F: I’m sorry, I don’t understand. Could you say it again? (B) F: Hope you can help David with his studies. (C) F: I would like to change his habit. (D) F: I hope you could change his bad habit.
Example Output:
D