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: M: Lily, I can't catch up with the English teacher very well. ,F: What's the problem? ,M: You are quite good at English. Can you help me with it? ,F: Sure, but you'd better take an additional course in some English schools. ,M: English schools? What's that? ,F: This kind of school is good at helping people to improve their English. ,M: Is that different from our school's English course? ,F: Yes. Before you start your training, they will test you on your English first.
(A) M: Why do they charge such high fees? What's more, how can they know my English ability without any tests? (B) M: Our high school will test my English before training, right? (C) M: Why do they need to test my English before training? (D) M: Excuse me, could you repeat the question?

Output: C


Input: Consider Input: M: Wow, this dance is surely cool. There are so many people here. Uh, what's your name? ,F: Susan, Susan Dawes. You really don't know who I am? You sit behind me in geography class. ,M: Oh yeah, you're right. I guess I'm just used to looking at the back of your head, not your face. ,F: Are you OK? You're so nervous. ,M: I'm sorry for my strange behavior. I don't know why I pretended I didn't know who you were. I just didn't know how to start the conversation.
(A) F: It's okay, you behaved cool just now. (B) F: So every time you don't know how to start a conversation, you behave awkward, right? (C) F: Never mind, you are polite. (D) F: I’m sorry, I didn’t catch that. Would you mind speaking more slowly?

Output: B


Input: Consider Input: M: You'd better take your umbrella with you. It looks like it's going to rain. ,F: You may be right. Thank you for mentioning this.
(A) M: It's snowing outside. (B) M: You are welcome. Be careful when you go out. It's raining and foggy. (C) M: I’m sorry, I didn’t catch that. Would you mind speaking more slowly? (D) M: You are welcome. It's really cloudy outside.


Output: D