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: Excuse me, how can I find the European paintings? ,F: Take the lift to the third floor and turn right. There just next to the black and white photography show. ,M: Got it. Thank you.
(A) F: Well, we are on the ground floor, so you could take the lift straight to where you want to go. (B) F: I'm sorry, I didn't understand. Could you repeat a little louder, please? (C) F: The Asian paintings you are looking for is just next to where we are now,which means it is next to the European paintings. (D) F: You know we are at the black and white photo show now, so you just take the lift to the forth floor and turn left you will find what you are looking for.

Ex Output:
A

Ex Input:
M: Hi, Rosa, what are you doing? ,F: I'm trying to pick an English literature course for this term. ,M: Take Professor Holds class. I took hers last year. ,F: Really? What's she like? ,M: Fantastic. I think she is really a good teacher. ,F: Why? What makes her so good? ,M: For one thing, she is really funny. She's also smart. So you learn a lot. ,F: What do you think of Professor Vance? ,M: He is boring. Most students fall asleep in his class and he is hard to talk to.
(A) F: I didn't hear you. Please could you tell me again? (B) F: Really? You think he is easy to talk to and you think Professor Holt's class is ordinary? (C) F: So, many teachers fall asleep in his class and you think Professor Holt's class is attractive? (D) F: So, he is hard to talk to and you think Professor Holt's class is attractive? Okay, I see.

Ex Output:
D

Ex Input:
M: Ah, where am I? ,F: Excuse me, do you need any help? ,M: I want to go to the Science Museum. But I've been lost for the past few hours, and I can't use these ticket machines.
(A) F: I'm sorry, I don't understand. Could you say it again? (B) F: Let me help you. You can go into the Science Museum now. (C) F: I am glad that you have found the way to the Science Museum by yourself. (D) F: Sorry, I don't know where the Star Museum is. You should ask someone else.

Ex Output:
B