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: Shirly, I'm working on our class diary for next week. Would you please give me the information? ,F: Sure. First is the deadline for after class activity application. The deadline is next Monday, June fourteenth.
(A) M: OK. The deadline of personal data is on June 14th, right? (B) M: I am really sorry, I did not catch that. Would you slow down, please? (C) M: I see. The deadline of photos for the club is on June 14th. (D) M: I see. The after-class activity application is due next Friday.

Ex Output:
B


Ex Input:
M: Do you like this house? ,F: Yes, it's beautiful. ,M: It's perfect for us and the kids. ,F: 3 bedrooms, 3 bathrooms and a big backyard. ,M: And we can afford it!
(A) F: I’m sorry, I didn’t understand. Could you repeat a little louder, please? (B) F: This room is cheap, but it's too small. Let's have a look at others. (C) F: This office is big and beautiful, but we can't afford it. (D) F: I love it. This house is big and beautiful. We can go through the buying process.

Ex Output:
D


Ex Input:
F: What time does the bus leave for the airport? ,M: I don't know. It used to leave every half hour, but I think the timetable has been changed.
(A) F: Yeah, I think so. They should put up some notes for the change of timetable. (B) F: Just a minute! I do not quite follow what you are saying, would you mind repeating that? (C) F: Thank you for telling me the way to the airport, that's exactly what I want to know. (D) F: Thank you! Are you sure they didn't change the timetable of the bus to the airport?

Ex Output:

A