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: Doctor Wilson, can I talk to you for a minute? ,F: Sure, Fred. What is it? ,M: I'm worried about my grade in your English Class. I really want an A, but. ,F: I see. Well, it might be hard for you to get an A. So far, you have a B average. You would need a 97 or 98 on your final exam to get an A. Do you think you can get that higher score? ,M: Probably not. The problem is that I have to have a B average in all the subjects to get the prize from our government. Otherwise, I'll have to find a part time job. I'm afraid it is difficult for me to put all my heart in my study if I have to work in my spare time. I'll probably get an A in history and a B in maths, but I'll get a C in chemistry.
(A) F: I am really sorry, I did not catch that. Would you slow down, please? (B) F: Sounds great that you can get A in history and maths. Happy for you! (C) F: You must have put in a lot of effort to get A in maths and chemistry! (D) F: Don' t be sad! At least you can get an A in history. Everything will be alright!
Example Output: D

Example Input: F: Hi, my name is Catherine. ,M: I'm John. It's nice to meet you. ,F: Do you know what this professor is like? ,M: I have no idea. This is my first year. ,F: You are a freshman? Me too. Where are you from? ,M: I'm from San Francisco.
(A) F: I've been there a few times. Now we are schoolmates, I can go there more often. (B) F: Oh, yeah, we met there and became friends since then. (C) F: Oh, yeah, I asked you the same question last year. (D) F: I'm sorry, I don't understand. Could you say it again?
Example Output: A

Example Input: F: Jerry, is that you? ,M: Hey Jenny. How are you doing? I don't think I've seen you in over 5 years. ,F: I know, it's been a long time. It's funny to run into you on Christmas Eve. ,M: Yeah, isn't that funny? Why aren't you at home with your family? ,F: My family doesn't live here. They moved to Texas 3 years ago. ,M: I see. Well, why don't you fly home to Texas for the holidays? ,F: I have to work tomorrow. Why didn't you go home? ,M: I wanted to, but I didn't have enough money to buy a plane ticket. ,F: I'm sorry you couldn't go home. How is everything else going? ,M: I'm OK but I'm having trouble finding a job. What's up with you? ,F: I can't complain. My job is going well, and I have a nice apartment. Since we're both alone for the holidays, we should have dinner together.
(A) M: OK, we can go to the cinema and see the new movie. (B) M: OK, we can talk while we are eating in the restaurant. (C) M: I know you like classical music, we can go to the concert hall to listen a concert. (D) M: I'm sorry, I don't understand. Could you say it again?
Example Output:
B