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: Mom? ,F: What are you doing here down at the beach? I thought you said you were going to buy some things for school? ,M: Uh, I did buy some things. ,F: Well, what did you buy? What do you have in your backpack? ,M: Let's see, I have 3 notebooks, 5 pencils, 2 erasers and...
(A) F: Why did you buy 2 notebooks and 5 pencils? (B) F: Why did you buy 3 notebooks ? (C) F: Why did you buy 3 notebooks and 5 pencils? (D) F: I am really sorry, I did not catch that. Would you slow down, please?

Ex Output:
B


Ex Input:
F: Excuse me, could you tell me how to get to the Water Cube from here? ,M: You can take a bus or a taxi. But the traffic is very heavy at the moment. So you'd better take the subway.
(A) F: Thanks for the advice, I'm definitely going to take the subway. (B) F: I take the subway to school every day. (C) F: You mean I should take a bus? (D) F: I’m sorry, I don’t understand. Could you say it again?

Ex Output:
A


Ex Input:
M: Are you going anywhere for the Chinese New Year? ,F: I thought about going to visit my aunt in New York. How about you? ,M: I'll probably just stay at home since it is not warm those days.
(A) F: Well, I am thinking about moving to New York. (B) F: Well, sounds like you have made your own holiday plan. (C) F: Excuse me, could you repeat the question? (D) F: Yeah. The weather recently is really warm.

Ex Output:

B