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: Would you consider buying a self-driving car? ,F: I don't know. I guess I'd have to research a bit more about them before making that decision. ,M: It will probably be a while before we are able to buy them anyway. We might be seeing self-driving trucks on the road pretty soon, though. Google wants to change the commercial trucking industry. Right now, there are over 3 million truck drivers in the US, so adding self-driving trucks would likely take away a lot of jobs. But many drivers might still be able to accompany their trucks and get a full night's sleep in the process. ,F: Truck drivers cause a lot of accidents on the freeway, so I think I'd like to see self-driving trucks. It would make me feel safer on the road. ,M: Really? I think it might make me feel less safe. A human driver is much more likely to react quickly to something unexpected.
(A) F: I am not agree with you, I don't think they are safer. (B) F: I am really sorry, I did not catch that. Would you slow down, please? (C) F: I am not excited by their speed because I think they are not safe at all. (D) F: Are you serious? I don't understand why you feel scared by them.

Ex Output:
D

Ex Input:
M: Ivy, how do you like your new apartment? ,F: Well, I wish I hadn't moved in. The man who lives upstairs often plays the piano till midnight. I really cannot stand it. ,M: Why don't you ask him to stop? ,F: I've tried, but it doesn't work. He never listens to me. what's worse, he isn't the only one that I cannot stand. The woman who lives across the hall often comes over to borrow things, but she seldom returns anything.
(A) M: Good, if you live together, you can borrow things from her. (B) M: I'm sorry, I don't understand. Could you say it again? (C) M: Oh, That's terrible. You should ask her to return back. (D) M: Oh, so do you want to rent an extra room from him?

Ex Output:
C

Ex Input:
F: Good morning, doctor Smith's office. What can I do for you? ,M: Hello, this is Bob speaking, there's a pain in my stomach. I'd like to make an appointment to see the doctor this afternoon. ,F: Let me see. I'm afraid he is busy at that time. ,M: How about tomorrow? ,F: Sorry, but he'll be busy too tomorrow morning, and our office won't open in the afternoon. Will the day after tomorrow be ok? ,M: Ok, morning please, as soon as possible. ,F: Then come at 9:00 o'clock in the morning, the day after tomorrow, please
(A) M: Ok, the day after tomorrow will be ok. (B) M: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (C) M: Well, I'll see the doctor tomorrow afternoon. I've been having the toothache for several days. (D) M: Well, I'll see the doctor this afternoon to treat my toothache.

Ex Output:
A