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: So what do you want to do tomorrow? ,F: Well, let's look at this city guide here. Huh, here's something interesting. Why don't we first visit the Art Museum in the morning? ,M: OK. I like that idea. And where do you want to eat lunch?
(A) F: I don't know. Since we don't have a city guide, let's go to the park tomorrow morning. (B) F: I'm looking forward to going to the art museum tomorrow. (C) F: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (D) F: Although we don't have a city guide, it's a good plan to go to the art museum tomorrow morning.
Example Output: B

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: F: Queen's Theatre, can I help you? ,M: Yes. Do you have 2 tickets for the show this Saturday? ,F: Well, all the tickets have been sold out, but we still have a few for Wednesday evening and Tuesday afternoon. ,M: Wednesday evening is OK. Have you got 2 near the front? ,F: Let me see. Just 2 tickets near the back. ,M: How much are they? ,F: They are $8 each. ,M: OK. I'll take them.
(A) F: Sure. It will be $8 in total. (B) F: Sure. It will be $16 in total. (C) F: Just a minute! I do not quite follow what you are saying, would you mind repeating that? (D) F: Sure. It will be $16 each.
Example Output:
B