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.

Ex Input:
M: I really have to thank Phi for letting me use this office. ,F: Please don't mention Phi. He's off at a Zurich conference and I'm stuck here with a double patient load.
(A) M: I’m sorry, I didn’t understand. Could you repeat a little louder, please? (B) M: You have more patients to meet. Hold on for several days and Phi will come back from Paris. (C) M: It seems that there are more patients waiting for you. I'll come later. (D) M: Thank you for sharing your office with me.

Ex Output:
C


Ex Input:
M: I'm really bored at the moment. ,F: Let's play a game. I'll describe someone and you try to guess who it is. OK, this man is tall and thin, he has blue eyes and curly brown hair. ,M: Does he have a mustache or a beard? ,F: Good question, yes, he has a mustache, but no beard. ,M: Sounds like Mike, doesn't it? ,F: Yes, you're right. Now, you describe someone we both know. ,M: OK, she's not very tall, but she is a little heavy, she has blonde hair. ,F: I don't think I know anyone like that. ,M: And she wears fashionable shoes, in fact, she wears fashionable clothes too. ,F: This doesn't sound like anyone I know. I give up, tell me who she is. ,M: She's your mother. ,F: Huh, that's actually a pretty good description, but it's embarrassing that I couldn't figure that out, my own mother. Do you think appearance is the most important thing about a person? ,M: No, but it's more important than a person's character in the game we're playing.
(A) F: Right, person's appearance is more vital, so we mentioned Lucy and your father, who's next we are going to talk about? (B) F: I’m sorry, I didn’t understand. Could you repeat a little louder, please? (C) F: Yes, we should focus on more the character of person, for example, you should tell me more when you mentioned Mike's mother just now. (D) F: Well, a person's career is really important, so we should talk more about the person you mentioned a few minutes ago, that's Alice, right?

Ex Output:
B


Ex Input:
F: Hi Bob. Did you talk to all of the witnesses to the car accident? ,M: Yes, an old lady was standing on the street corner when the accident happened. She said that it was the red cars fault. It was driving very fast and then quickly stopped when the traffic light changed.
(A) F: I’m sorry, I didn’t understand. Could you repeat a little louder, please? (B) F: Since we are police officers, why didn't you talk to any witnesses? (C) F: We were witnesses. Fortunately, no one was standing on the street corner when the accident happened. (D) F: Although no one was standing on the street corner at the time of the accident, we were the victims.

Ex Output:

A