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:
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?

Ex Output:
D


Ex Input:
F: I must leave early tomorrow, so it will be difficult to take you to school in the car. ,M: Oh, my bike is in the repair shop, so I guess I'll have to take a bus.
(A) F: So, you mean your bike is not in the repair shop and you will go to school tomorrow by car? (B) F: Really?  Your car is in the repair shop and you will go to school tomorrow by bus? (C) F: Oh, you mean your bike is in the repair shop and you will go to school tomorrow by bus? (D) F: Just a minute! I do not quite follow what you are saying, would you mind repeating that?

Ex Output:
C


Ex Input:
F: Have a cup of coffee? ,M: No, thanks, not before lunch. ,F: Please have one. It's just cooked. ,M: I honestly don't feel like one at the moment, thanks.
(A) F: I’m sorry, I don’t understand. Could you say it again? (B) F: I'm not surprised that you don't have coffee before dinner. (C) F: Okay then, seems like you don't have the habit to have coffee before lunch. (D) F: I didn't know you preferred tea before dinner.

Ex Output:

C