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: It's wonderful after the rain. The Sky is clear and the air is so fresh. ,F: You bet. Let's go for a walk outside on this fine day.
(A) M: Definitely, let's go out and enjoy the sunshine now. (B) M: It's been sunny for days. I feel really hot. (C) M: It's cloudy. I'd rather stay at home. (D) M: I am afraid I did not quite catch what you were saying. Please repeat it.

Ex Output:
A

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:
F: Good morning, young man. What's your name, please? ,M: My name is Zhang Ming. I'm 12 years old now. Can you introduce your doctors? ,F: We doctors in this hospital fly to different poor places. People with eye problems can come to us. We give medicine to the poor or do operations on them free. ,M: I started to have problems with my eyes when I was 7. Now I can't see things clearly. Can you help me?
(A) F: I didn't hear you. Please could you tell me again? (B) F: You mean you have had the eye problem for five years, right? (C) F: Even if you had 7 years of eye problem since you were 8, we could cure it. (D) F: Why you can see things clearly? You said you had 12 years of eye problems.

Ex Output:
B