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: Nice to see you, Mary! Come in, please! ,F: Thank you Tom, but I am afraid not now. I've come only to return the book borrowed from you. ,M: Wonderful. I've been waiting for you a long time and longing to know what you think of it. ,F: It is very interesting and I've learned a lot from it. ,M: Well, so it is with me.
(A) F: I'm here to ask you for help. (B) F: I am really sorry, I did not catch that. Would you slow down, please? (C) F: I'm here to invite you for dinner. (D) F: Now, here is the book to be returned.

Ex Output:
D

Ex Input:
F: Where are you going for your birthday tomorrow? ,M: I have booked a room in the Blue Bay Restaurant. ,F: You mean the Blue Sky Restaurant? ,M: No, that's the Blue Bay, just across from the Blue Ocean Restaurant.
(A) F: The Blue Ocean Restaurant is opposite the Blue Bay Restaurant, right? (B) F: I'm sorry, I didn't catch that. Would you mind speaking more slowly? (C) F: You have booked a room in the Blue Ocean Restaurant? It is the one which is beside the Blue Sky Restaurant, right? (D) F: You have booked a room in the Blue Ocean Restaurant? It is the one which is opposite the Blue Bay Restaurant, right?

Ex Output:
A

Ex Input:
F: James, have you heard of a gap year? ,M: No, what's that? ,F: It's when you take a year off between finishing high school and going to college. It's popular in the UK. ,M: Hmm...What do people do for that year? Work? ,F: Some people do, other people volunteer. But mostly, it's for traveling and taking it easy for a little while. ,M: Do you like that idea?
(A) F: After the second year of college, there will be a gap year. I really like this idea and enjoy my traveling at that period. (B) F: Yes. Before the first year of college, student will take a year off for traveling. And after this period, students will turn to the gap year. (C) F: Excuse me, could you repeat the question? (D) F: Yes, I do. Before the first year of college is a gap year and I will travel for a little while at this period.

Ex Output:
D