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: Excuse me, do you have a few minutes? I work for the Star Bookstore, and we are doing a survey about people's reading habits. I want to ask you a couple of questions.
(A) M: I am afraid I did not quite catch what you were saying. Please repeat it. (B) M: I know that bookstore. The Sun Bookstore is very famous. (C) M: You mean you are doing a survey about people's eating habits, right? (D) M: Of course. I am willing to accept this survey. I like reading books.
Example Output: D

Example Input: M: We've just moved into a new house. ,F: Really? Congratulations. ,M: Thank you. I think we want to buy a new television set. ,F: What kind of television do you want to buy? ,M: A color TV set, of course. But I'm not sure about the size. Maybe we should buy a big one. If we buy a small one, we might have to exchange it in a few years for a bigger one. That would be a waste of money. What's your opinion? ,F: In my opinion, I don't think it's necessary to buy a very big one.
(A) M: Why do you think we should get a small TV set but now a big one? (B) M: Yeah. We should buy a small TV set and change it in the future. (C) M: I agree with you. We should buy a big TV set instead of a small one. (D) M: Excuse me, could you repeat the question?
Example Output: A

Example Input: F: Are you staying by yourself again this summer vacation? ,M: No, I'm not. My brother and sister are staying with me right now. ,F: Really? What are they doing this summer? ,M: Well, my brother is on vacation now. He always wants to come and visit the city. ,F: What about your sister? ,M: She has a part-time job at the university. ,F: And do you have anything special to do? ,M: Nothing special. I work as a waiter in the morning and in the afternoon I read books bought from a bookstore days ago. What about you June? Are you in school this summer? ,F: Yes, I am. ,M: Oh, are you taking French in Spanish again? ,F: Well, I'm not taking them, but I'm starting Japanese. ,M: Really? That's exciting.
(A) F: I'm sorry, I don't understand. Could you say it again? (B) F: Although I am just getting started, I love learning Spanish very much. (C) F: I am going to learn Japanese by myself at home. (D) F: Yes. Learning Japanese is really exciting for me.
Example Output:
D