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: Hi, my name is Catherine. ,M: I'm John. It's nice to meet you. ,F: Do you know what this professor is like? ,M: I have no idea. This is my first year. ,F: You are a freshman? Me too. Where are you from? ,M: I'm from San Francisco.
(A) F: I've been there a few times. Now we are schoolmates, I can go there more often. (B) F: Oh, yeah, we met there and became friends since then. (C) F: Oh, yeah, I asked you the same question last year. (D) F: I’m sorry, I don’t understand. Could you say it again?

Output: A


Input: Consider Input: F: Are you going to be an engineer when you grow up? ,M: Yes, what about you? ,F: I want to be a teacher, but my parents want me to be a doctor.
(A) M: Just a minute! I do not quite follow what you are saying, would you mind repeating that? (B) M: Oh, you want to be a teacher in the future. (C) M: Your parents want you to be a teacher in the future. But you want to be a doctor when you grow up, right? (D) M: You want to be a doctor when you grow up, right?

Output: B


Input: Consider Input: M: Today I'm talking to Marta Dancedand who runs her own mobile restaurant. Marta, how did you get into the restaurant business? ,F: Well, I learned to cook at college. I always wanted to open my own restaurant, but had no money so I got a job as a chef. I had all sorts of ideas for new dishes, which the staff thought would sell but the boss wasn't interested. That's when a friend told me about the mobile restaurant idea. It sounded great. ,M: Tell us about it. ,F: Well, it works like this. You decide on a menu. Obviously you have to be able to cook. Then you advertise it so people can book a meal. The most amazing thing is all the advertising is done through websites. People set up tables in their sitting room or in a city car park, an empty factory, anywhere in fact and because you know how many people you're cooking for, food doesn't get wasted. ,M: So why is it good for you? ,F: Well, various reasons, like I could buy all the things without risk because customers pay in advance. The greatest advantage, though, is by having 10 customers at most. I don't need to hire a waiter. ,M: Do you ever run into problems? ,F: The whole experience is fun. People watch you cook and the atmosphere is relaxed. I did one meal on a beach, which almost went wrong because I didn't think about the wind blowing sand into people's food. Fortunately, I brought a large umbrella to protect myself from the sun. So I put it around their table instead.
(A) M: So you didn't know that the sun was that strong and none of you brought an umbrella, right? (B) M: I’m sorry, I didn’t catch that. Would you mind speaking more slowly? (C) M: What? None of you brought an umbrella and you just let the wind ruin the meal? That's terrible! (D) M: You mean that the wind almost ruined the meal, but luckily you brought a large umbrella, didn't you?


Output: D