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: 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 can't wait for my birthday party this Saturday evening. I hope it will be better this year. I'm hoping for something surprising and a lot of gifts. ,F: It will be. There will be a lot of people at your party. ,M: I know my friends are preparing to give me a big surprise these days. ,F: How do you know? ,M: I saw Tom wrapping a big box with Alice, Bob and Annie
(A) F: Oh, I am pretty surprised about that, they really did a lot things for Bob's birthday party this Saturday evening. (B) F: I am really sorry, I did not catch that. Would you slow down, please? (C) F: To tell the truth, I'm as excited as you are, I also want to know the result of the test we did yesterday. (D) F: You are so calm, don't you want to know what they have prepared for Alice's birthday party this Saturday evening?

Ex Output:
B


Ex Input:
F: Excuse me, could you tell me when the opening ceremony of the import and export will start? ,M: It's a quarter past seven. We have to wait for another 3 quarters.
(A) F: I see. The opening ceremony will start at 7:45. (B) F: I see. The opening ceremony will start at 8:00, so we have to wait for another quarter. (C) F: I’m sorry, I don’t understand. Could you say it again? (D) F: I see. The opening ceremony will start at 8:15.

Ex Output:

C