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:
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: Excuse me, I asked for this salad without cheese on it, but this one is covered in it. ,F: I'm sorry, sir. I'll take it back and bring you out a new one. Can I get anything else for you? ,M: Just another soda, please. Thank you.
(A) F: You are welcome, I'm bringing you the salad right now. (B) F: I am afraid I did not quite catch what you were saying. Please repeat it. (C) F: Ok, I will take away your soda. (D) F: Please wait a moment and I will bring you some cheese.

Ex Output:
A


Ex Input:
M: You're late today. There is a staff meeting in 10 minutes. ,F: OK. ,M: Oh, what's wrong with your finger? It's bleeding. ,F: I hurt my finger by the taxi door when I got off, and then I was hurried to the subway station without cleaning it. It will be OK soon. ,M: Are you sure? You better go to a clinic first.
(A) F: I’m sorry, I didn’t catch that. Would you mind speaking more slowly? (B) F: It's OK. I just got hurt when I was getting off a taxi. (C) F: It's OK. I hurt my finger when I was having a meeting. (D) F: I'm fine.I hurt my finger when I was rushing to the subway.

Ex Output:

B