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: One ticket to Chicago, please. ,M: Yeah, Ok, that's $24.00. ,F: Does this one have a dining car? ,M: Yeah, there is a dining car and a snack bar. Here's your change. ,F: Thanks.
(A) M: Why isn't there a dining car? We are on the train, aren't we? (B) M: So although we are in the dinning hall, there is no snack bar, right? (C) M: Why isn't there a dinning hall in the ticket office? (D) M: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that?

Output: D


Input: Consider Input: F: Dad, look at this friendship quiz. ,M: Why don't you try it? The first question, how often do you get in touch with your friends? ,F: Hmm... My friends aren't in the same secondary school as me, and I dislike ringing people up. I don't call my friends, even once a week. ,M: That means seldom. Secondly, how many friends can you talk with when you are upset? ,F: Oh, I can't think of any. I usually talk with you or mom when I feel sad.
(A) M: Poor Susan. So you usually talk with your friends when you're upset. (B) M: Poor Susan. So you usually talk with me and your mother when you're upset. (C) M: Poor Susan. So you usually talk with me and your mother when you're happy. (D) M: I am afraid I did not quite catch what you were saying. Please repeat it.

Output: B


Input: Consider Input: F: Can I help you? ,M: Have you got anything that tells people how to take care of their eyes?
(A) F: Of course we have, and we have many different kinds of books in our store, the magazine you want is over there. (B) F: Excuse me, could you repeat the question? (C) F: Yes, we have, you can get them from the doctor standing there. (D) F: Yeah, if you want to get something that tells pepple how to take care of their legs, you can get them from the doctor in the next door.


Output: C