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: The guests are leaving for New York today on the 10 o'clock flight. We need someone to get them to the airport on time. ,F: But my car is under repair now. I think I'll have to call a taxi.
(A) M: The guests are leaving for New York by car. (B) M: The guests are leaving for New York by air. (C) M: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (D) M: The guests are leaving for New York on the 11 o'clock flight.
Example Output: B

Example Input: F: Excuse me, are you going to buy that textbook? ,M: Well, yeah, I need it for a class. But it's awfully expensive. ,F: Oh, we must be in the same class! Civil engineering? ,M: Yes, that's the one! ,F: Were you there last Friday for the first class? ,M: Yes. I only moved here last Monday, and I registered for the class last Tuesday. By the way, I thought Professor Qian really seemed to know his subject.
(A) F: Great. Since you moved here last month, you must have your first class last Monday. (B) F: Yes. It is great that you registered for class last Monday and had your first class last Tuesday. (C) F: His courses are great. You must learnt a lot of Civil Engineering in your first class last Friday. (D) F: I am afraid I did not quite catch what you were saying. Please repeat it.
Example Output: C

Example Input: M: Did you see those robots? They were so smart. I can't believe how many different kinds there were at the technology show. They could do so many things too. Even activities that I thought could only be done by human hands. ,F: It's really amazing. ,M: I understand why they say that China's future is in robots, they will change society. ,F: That's exactly what I'm afraid of. Can we predict what the consequences will be? ,M: Well, it is hard to say.
(A) F: I think the man is careless about people. (B) F: Just a minute! I do not quite follow what you are saying, would you mind repeating that? (C) F: I'm afraid using robots might not be good for people. But maybe I worry too much. (D) F: I'm afraid using robots might not be good for people.
Example Output:
D