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.

Example Input: M: Was the movie as good as you expected? ,F: It was a waste of time and money. We should have stayed at home. ,M: Why are you so angry about it? It was just a film after all. ,F: To be honest, nothing in it was worth mentioning.
(A) M: Since you think it's a waste of time and money, why do you want to see it again? (B) M: Since you think the film is very bad, why don't you think it's a waste of time and money? (C) M: I am afraid I did not quite catch what you were saying. Please repeat it. (D) M: So you think this movie is very bad, right?
Example Output: D

Example 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.
Example Output: D

Example Input: M: Do you know the Thames? ,F: Yes, it's a very beautiful river. It is in the south of the country and runs to the east, into the North Sea.
(A) M: You are right, the Thames runs to the south of the country. (B) M: I'm sorry, I didn't understand. Could you repeat a little louder, please? (C) M: The river originates from The North Sea? I didn't know that before. (D) M: You are right, the Thames runs to the west of the country.
Example Output:
B