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, I'm from the students' union. We're doing a survey of students' eating habits. Would you mind if I ask you a few questions? ,M: Not at all. ,F: What's your favorite food? ,M: Hamburgers and french fries.
(A) F: Okay, so you like vegetables and fruits most, your information is very useful to the test we are doing. (B) F: Alright, hamburgers and french fries are your favorite food, and what's your least favorite food? (C) F: I didn't hear you. Please could you tell me again? (D) F: So you like chocolate and cake best, since you mind us asking questions,we won't ask more.
Example Output: B

Example Input: M: You only have an hour for lunch. ,F: Well, now I have only 45 minutes. ,M: That's not much time. Where should we go? How about Tornis Ettling Restaurant? Just across the street. I love the pizza. ,F: I love the food too, but they are really slow. Last week, I waited 30 minutes for my food. ,M: OK. Let's have a sushi at the David's. We can be in and out in 20 minutes. ,F: Today is the Thursday, David's is not open.
(A) M: Oh, yes. It is usually crowded on Thursday. (B) M: I didn't hear you. Please could you tell me again? (C) M: Oh, yes. It is usually closed on Friday. (D) M: Yes, it is really far and crowded today.
Example Output: B

Example Input: F: Excuse me. Could you tell me where the principal's office is? ,M: I'm sorry. I'm just visiting a friend here.
(A) F: Oh, you are here visiting a family member? I'm surprised that you won't wait at the entrance. (B) F: OK, I'm surprised that you just said you couldn't show me the direction. You have been living here for years. (C) F: OK, I'm surprised you just said that you've met me somewhere before. (D) F: I'm sorry, I didn't catch that. Would you mind speaking more slowly?
Example Output:
D