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.

Input: Consider Input: F: What can I do for you? ,M: I want to check out these books. ,F: Your library card, please? Oh, you have late fees. It comes to $4. You have to pay it off before you can check out more books. ,M: OK, no problem.
(A) F: Sorry, our bookstore is closing now. (B) F: You can apply for a library card over there. (C) F: Just a minute! I do not quite follow what you are saying, would you mind repeating that? (D) F: Besides, may I see your ticket to the museum? I need to check it out.

Output: C


Input: Consider Input: F: Hi jack, what did you think of the lecture you attended last night? ,M: Well, I should have stayed at home. And half of people had left before it was finished.
(A) F: Just a minute! I do not quite follow what you are saying, would you mind repeating that? (B) F: Yes, it is so moving! (C) F: Yes, the concert yesterday was really boring. (D) F: Why do you think it was boring?

Output: D


Input: Consider Input: M: You fix the time at 4:45, but shall I change it to 5:30? ,F: I'm afraid it's too late. I have to pick up my son at 7:00 o'clock. But I can manage to arrive at 5:00 o'clock.
(A) M: OK then, I will make it on time. But since when have you been picking up your son at 7:00? I didn't know that at all. (B) M: OK, see you at 7:00 p.m. (C) M: Why did you fix the time at 5:00? (D) M: I’m sorry, I don’t understand. Could you say it again?


Output: A