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: Miss Robertson, for the past 3 weeks, I've been getting complaints about your work. ,F: Uh...What do you mean? What kind of complaints? ,M: Well, your supervisor told me you're turning your reports in 2 to 3 days late. You're often absent from staff meetings and you haven't been getting along with your colleagues. ,F: Look, Mr. Travers, I can explain.
(A) M: I am afraid I did not quite catch what you were saying. Please repeat it. (B) M: The internal medicine department is on the second floor of the hospital. Now you can start explaining. (C) M: Now you can start explaining right in our office. (D) M: We'll go back to the office later and you can explain. I don't want to listen your explain now.

Ex Output:
C


Ex Input:
F: I think I should use the bathroom before we go. It's a long drive to the countryside. ,M: Yes, but there are plenty of rest stops along the highway. ,F: I know. I guess this is why driving is much more convenient than taking a bus or train.
(A) M: There is no rest stop along the way. It would be too tired for you. I'll drive. (B) M: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (C) M: Which bus should we take? (D) M: We take the train to the countryside. I've booked the tickets.

Ex Output:
B


Ex Input:
F: Do you still have 4 flats with 3 bedrooms Mr white? ,M: No madam, we only have one now, it's on the top floor. Shall we go and see it?
(A) F: There is only one flat with three bedrooms? (B) F: I think three flats with four bedrooms are enough. Let's go and see it. (C) F: I think three flats with three bedrooms are enough. Let's go and see it. (D) F: Just a minute! I do not quite follow what you are saying, would you mind repeating that?

Ex Output:

A