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: 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.

Output: D


Input: Consider Input: F: Have you seen this story in The Herald? It says The Times is closing down in three months' time. ,M: Ben, that's good news. That newspaper is terrible. I won't miss it.
(A) F: Why do you feel disappointed about The Times? It is not going to close down. (B) F: Why do you feel joyful about The Times? It is closing down in two months. (C) F: You must feel joyful as The Times is going to close down in three months. (D) F: Just a minute! I do not quite follow what you are saying, would you mind repeating that?

Output: C


Input: Consider Input: M: Talking about the twenty first century, I think there will be huge changes in the way people use cars. Laws will be made about what kind of car you can own, and when you can use it. ,F: Maybe there'll just be too many of them on the roads. The air will be so seriously polluted that nobody will be able to breathe normally.
(A) M: I am afraid I did not quite catch what you were saying. Please repeat it. (B) M: Yeah, I agree with you. And I think laws of car use will be made because road traffic has to be controlled, like what kind of car you can own. (C) M: Yeah, the air will not be so seriously polluted. Well, I think laws of car use will be made because there will be new ways of travelling. (D) M: Yeah. There will be little changes in the way people use cars. And I think laws of car use will be made because too many people enjoy air travel.


Output: B