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: Amelia, what in particular do you have to do as a wedding planner? M;,F: I make most of the big decisions with the exception of more personal ones, such as what the bride will wear or who will be invited. I also booked the venue and the photographer. M;,F: So, do people ask you to organize their weddings to save money? M;,F: Well, I reduce some of the costs. But they have to pay my fee, so it works out about the same. In most cases, they are simply too busy to do it without assistance. M;,F: Tell me, what made you want to become a wedding planner? M;,F: In my case, it was after I'd been doing some voluntary work for a non-profit organization. Others come into wedding planning through different routes, such as restaurant management or providing meals for open air events. M;,F: So how could someone find work in this type of business? M;,F: Well, some companies offer courses, or you can provide written references from past clients. But in my case, people were impressed by shot of beautiful weddings planned and run by me.
(A) M: So, people were impressed by shot of beautiful weddings and you just attracted customers by presenting beautiful pictures? (B) M: Just a minute! I do not quite follow what you are saying, would you mind repeating that? (C) M: Really? You mean I can provide written references from new clients but you attracted customers by presenting beautiful pictures? (D) M: So, people were not impressed by shot of beautiful weddings and you attracted customers by showing them written references?
Example Output: A

Example Input: F: Tom, this bicycle will be good for racing and it isn't very expensive. ,M: Yes, but my son needs a heavier bike to use when he delivers his papers.
(A) F: Then you should take a look at this one, it's lighter and more expensive. It meets all your requirement. (B) F: Then you should take a look at this one, it's lighter so it's convenient to deliver packages. It meets all your requirement. (C) F: I’m sorry, I didn’t understand. Could you repeat a little louder, please? (D) F: Then you should take a look at this one, it's a racing one and it's lighter. It meets all your requirement.
Example Output:
C