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: Hello, China Travel Agency. Can I help you? ,M: Yes, I'd like to travel to London. So I want to make a reservation for me on May fourth. ,F: Just a moment, please. I'm sorry, but the flights are fully booked on that day. The next available flight is on May fifth. They have 2 flights: one at 9:30 AM and the other at 2:00 PM. Both flights have seats available. ,M: That's great. I'd like to take the first available flight. What's the fair, please? ,F: 2250 yuan. ,M: Here is 2300 yuan.
(A) F: Okay, as you want to take the last available flight, you have to pay 2,300 yuan in total. (B) F: Really? You mean here is 3300 yuan? Oh, actually you just have to pay 2,250 yuan in total. (C) F: Just a minute! I do not quite follow what you are saying, would you mind repeating that? (D) F: Well, as you want to travel to London and take the first available flight, you have to pay 2,350 yuan in total.
Example Output: C

Example Input: M: When will we meet at the cinema? ,F: Tom can leave school at 4:00 o'clock. I may get there at 5:00 o'clock. Let's say 6:00 o'clock.
(A) M: So let' meet at 6:00 o'clock. (B) M: So let' meet at 5:00 o'clock at the restaurant. (C) M: I’m sorry, I don’t understand. Could you say it again? (D) M: So let' meet at 6:00 o'clock at the restaurant.
Example Output: A

Example Input: F: Good morning, sir. May I come in? ,M: Good morning. Yes, please. Take a seat. I guess you want to open an account, right? ,F: Yes. ,M: Great. What account do you want to open? A checking account or a saving account? ,F: I would like to open a saving account in your bank. What is the procedure? ,M: Would you like to open an account in a single name or in joint names? ,F: I would like to open a joint account with my father. ,M: In that case, both of you have to present identification papers and a set of two photographs each.
(A) F: Thank you. That will be four photos in total, right? (B) F: I am really sorry, I did not catch that. Would you slow down, please? (C) F: OK. We need to prepare 3 photos in total, don't we? (D) F: Are you sure that we only need 2 photos in total?
Example Output:
A

