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: When will we meet at the cinema? ,F: Tom can leave school at 4:00 o'clock. I may get there at 5:00 o'clock. Let's say 6:00 o'clock.
(A) M: So let' meet at 6:00 o'clock. (B) M: So let' meet at 5:00 o'clock at the restaurant. (C) M: I’m sorry, I don’t understand. Could you say it again? (D) M: So let' meet at 6:00 o'clock at the restaurant.

Ex Output:
A


Ex Input:
M: Can we go somewhere and talk about your experience abroad? It's noisy in the cafe. ,F: Shall we go to the tea house upstairs? ,M: But I need to get some fresh air. ,F: Well, there's a park nearby. It's usually not crowded at this time of day.
(A) M: I’m sorry, I don’t understand. Could you say it again? (B) M: Great, the air in the park is comfortable (C) M: Ok, then go to the tea house downstairs you have mentioned. (D) M: Ok, I'd like to share with you my experience abroad in the cafe.

Ex Output:
B


Ex Input:
M: I have looked everywhere for the sign up sheet for next week's Field Trip. Have you seen it, Matilda? ,F: I saw it yesterday. But I'm not sure where it is now, and I don't know whether I'll be able to join you.
(A) M: I am still not sure about when I can take the field trip. (B) M: I want to know about where the sign-up sheet is, so we can go to the field trip together. (C) M: I am still not sure about where the sign-up sheet is. (D) M: I’m sorry, I didn’t catch that. Would you mind speaking more slowly?

Ex Output:

C