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: Michael, what time is it? We are going to be late for the party. ,M: It's a quarter past six. Don't worry, Rebecca. We will be fine. ,F: But we have to be at Sarah's house by 6:30 for her surprise birthday party. The traffic is getting heavier.
(A) M: I’m sorry, I don’t understand. Could you say it again? (B) M: We have to be at Sarah's house by 6:00 for her baby' s birthday party. (C) M: Oh my god. You' re right! Let' s go to celebrate Sarah's birthday! (D) M: The traffic is getting lighter, we will not be late for Rebecca' s party.

Ex Output:
C


Ex Input:
M: You ran into Peter on the street yesterday. Did he say anything about Mary? ,F: Yes. She ought to be leaving Beijing very soon because she has been admitted to Harvard University.
(A) M: I’m sorry, I don’t understand. Could you say it again? (B) M: Peter will leave Beijing soon. Because he has been admitted to Harvard University. And Mary will stay in Beijing. (C) M: I'm so pleased that Mary will leave for America soon. I hope that she will enjoy her study at New York University. (D) M: I'm so pleased that Mary will leave for America soon. I hope that she will enjoy her study at Harvard University.

Ex Output:
D


Ex Input:
M: Sophie, what was high school like in America? ,F: It was great. Lots of fun. I had lots of friends and I learned quite a bit at school. ,M: OK. What did you do in high school, any clubs or anything? ,F: Yeah, I'd rowed for the school. I played basketball and tennis with friends and I was on the swimming team. ,M: Wow, you're quite active. What sport did you like the most? ,F: Rowing. ,M: Rowing huh? Do you still row? ,F: No, unfortunately not. I spent the last year in Canada. No one likes rowing there. ,M: Really? ,F: I would like to start up again. ,M: Do you think you would pick it up some time in the future? ,F: Yeah, maybe. If I live near a lake or a river.
(A) M: You didn't attend any clubs in high school, but why do you want to start rowing again? (B) M: I am afraid I did not quite catch what you were saying. Please repeat it. (C) M: You can do it. You have lived near a lake, so you can go running around a lake. (D) M: I can't understand why you want to go swimming in a river. You never swim before.

Ex Output:

B