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: F: Hello, Amazon's customer service. How can I help you? ,M: Hello, it's the book I got from your website yesterday when I was reading it. I found that one page is missing, page 53. ,F: I see. May I have your order number, sir? ,M: It's B113. Dash 7423935. ,F: OK. Let me check. It's the paper bag night of the Hunter written by RA Salvatore you bought on our web 10 days ago, which is on October thirteenth, right? ,M: Yes. ,F: Well, we might need you to take a photo of the missing part of this book and upload it to the customer service page of our website. And when the problem is confirmed, we will send you a new book in 2 days.
(A) M: Okay, so I need to use the receipt to confirm the problem of the book. (B) M: Okay, so I need to take a photo to confirm the problem of the car. (C) M: Okay, so I need to use the order number to confirm the problem of the book. (D) M: I’m sorry, I didn’t understand. Could you repeat a little louder, please?
Example Output: D

Example Input: F: I notice an article in the newspaper about the problem of rapid growth of cities in America. I was wondering do you Americans carry out a birth control policy? Can Americans have as many children as they want? ,M: Yes, sir. We can have as many as we want, but most people decide to have only one or 2, and some people decide not to have any. ,F: Why do they decide not to have any? In the old days, we Chinese always wanted to have as many as possible. Some still do now.
(A) M: I am really sorry, I did not catch that. Would you slow down, please? (B) M: Well, most Americans also decide to have as many children as they can. (C) M: I have no idea. Most Americans decide not to have any children. (D) M: Well, with the birth control policy, most Americans only have one or two children.
Example Output: A

Example Input: M: Who are the people in this photo? ,F: Oh, that's my homestay family. I'm going to Australia for a year on an exchange program. And those are the people I'm living with. Those are the parents, Mr. and Mrs. Smith. Their daughters' names are Jenny and Cindy, and their son's name is George. ,M: Is that George there? ,F: No, that's Jenny's husband, Charlie. They were just married. George is the one in front. ,M: Good looking man, he's not married? ,F: No. Cindy's not married, either. But Jenny and Charlie are moving to their own house next week. So it won't be as crowded as it looks. I'm leaving for Sydney in a month. ,M: Well, have a great time.
(A) F: Excuse me, could you repeat the question? (B) F: Thanks. I'm leaving for Sydney in a year. (C) F: Thanks. I'm leaving for Shanghai in a month. (D) F: Thanks. I'm leaving for Sydney in a month.
Example Output:
D