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: What are you studying in college? ,F: My major is computer science. ,M: Is it difficult to learn computer science? ,F: No, it's a piece of cake, I think.
(A) M: I didn't hear you. Please could you tell me again? (B) M: Why do you think computer science is difficult? (C) M: Computer science is really easy. (D) M: Oh, your major is international trade.

Ex Output:
C

Ex 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.

Ex Output:
B

Ex Input:
M: Let me see, I have printed my family name, first name, date of birth and address, anything else? ,F: No, we'll fill in the rest of it if you'll just sign your name at the bottom. ,M: Ok, here?
(A) F: Please sign your name at the top and wait for the interview. (B) F: Yes, just fill out the form here. (C) F: I am afraid I did not quite catch what you were saying. Please repeat it. (D) F: You haven't printed your name. How you ask for information.

Ex Output:
B