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: M: Ella, what languages do you speak? ,F: As you know Korean is my first language. I also speak English and Chinese. How about you? What languages do you speak? ,M: English, German and French. While I was studying in Europe, I used French in German all the time. Now, my French is not so good but I do keep my German up.
(A) F: My mother tongue is Korean, but I can't speak any other language. (B) F: I’m sorry, I don’t understand. Could you say it again? (C) F: We can both speak English. English is my mother tongue. (D) F: My native language is Chinese, but I can't speak English.
Example Output: A

Example Input: M: My parents give me 300 yuan each month. ,F: 300 Yuan? That's 150 yuan more than I get from my parents.
(A) M: You get 450 yuan each month? I envy you. (B) M: You get 150 yuan more than I do. (C) M: Then you get 300 yuan each month, the same as I do. (D) M: I am really sorry, I did not catch that. Would you slow down, please?
Example Output: D

Example Input: M: Didn't you just get that book from the library? ,F: Yes, a few days ago. ,M: It looks like you're almost finished with it. Why are you reading it so fast? ,F: I like the story so much that I can hardly put it down. ,M: Well, we can't get to the library until the weekend, so you won't have anything new to read until then. You should read only a few chapters each day. ,F: I'll do that with the next book. This one is too exciting. ,M: What are you going to do for the rest of the week? There are 4 days left before Saturday arrives.
(A) F: I think I'll read this book again for the rest two days before Saturday. (B) F: I think I'll read this book again for the rest three days before Saturday. (C) F: I think I'll read this book again for the rest four days before Saturday. (D) F: I’m sorry, I don’t understand. Could you say it again?
Example Output:
C