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: 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?

Output: D


Input: Consider Input: F: Your school bag is really cool. Where did you get it? ,M: My aunt sent it from Australia for Christmas.
(A) F: I see, your favorite holiday is Christmas, your uncle bought you a bag for Christmas, right? (B) F: Your aunt sent the school bag to you from Australia. It's so cool! (C) F: It's nice of your aunt to send you a bag from England. (D) F: Just a minute! I do not quite follow what you are saying, would you mind repeating that?

Output: B


Input: Consider Input: F: Will you be doing basketball on Wednesdays this year? ,M: No. My mom says she can take me to practice then, so I'm going to do football. ,F: What about Saturday mornings? Tennis? ,M: I don't know. I'll check with my parents.
(A) F: Excuse me, could you repeat the question? (B) F: Although you will play football on Wednesdays, you will play basketball on Saturday mornings, won't you? (C) F: Wow, you will play football on Wednesdays, great! (D) F: You will play tennis on Wednesdays, so you will play basketball on Saturday mornings.


Output: C