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: Hey, May, how are you getting to Xi'an next week? ,F: I'm not sure yet. I may take the train, but then again, I may take the bus. ,M: But the bus takes a long time. You could fly. It's not so expensive these days.
(A) F: You have a point. I'm going to check out if it's cheaper to get there by plane. (B) F: It's so nice of you to go there by bus with me together. (C) F: Thank you, I like travelling by train as well. (D) F: I’m sorry, I don’t understand. Could you say it again?

Ex Output:
A


Ex Input:
F: Oh, it's so nice to be out of the cinema. It was so hot in there. I thought I melt. ,M: Terrible, wasn't it? Well, what did you think of Madame Curie? Do you think it is as good as the review said? ,F: It's a good film, but not as good as the book. I think some of the story was missing in the film. ,M: Yes, but you couldn't possibly fit everything that happens in a 200 page novel into a 2 hour film. There simply isn't the time. ,F: I know, but the director should at least try to follow the story. With this film, he left out some important people and even changed the end. ,M: Well, perhaps he thought he was improving the story, Karen.
(A) F: He did. His film is far more realistic than the book. I like it. (B) F: I am really sorry, I did not catch that. Would you slow down, please? (C) F: Obviouesly, the book is better than the film, though he changed nothing. (D) F: He might. But I still like the original book than the film.

Ex Output:
D


Ex Input:
F: What do you plan to do on your vacation? ,M: I'm just going to be lazy at home. I will probably do some gardening, watch TV and work on my stamp collection. However, I once volunteered to protect our planet in the west.
(A) F: I didn’t hear you. Please could you tell me again? (B) F: I don't think so. It is not a good choice to stay at home on weekdays. (C) F: Ha ha! I also like to stay at home on holidays. (D) F: I'm so disappointed that you didn't even think about volunteering in the west.

Ex Output:

C