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: Besides the medicine you gave me, do you think I should have some chicken soup? ,M: I'm afraid it can only make your stomachache worse.
(A) F: I will buy a bag of chicken soup then. Where is the cashier of the department store? (B) F: I will order one chicken soup then. Your soup is always so delicious. (C) F: I am really sorry, I did not catch that. Would you slow down, please? (D) F: Ok doctor, I will have some chicken soup and medicine then.

Ex Output:
C


Ex Input:
F: How often do you exercise? Do you play any sports? ,M: I do sports at school, that's about 3 hours every week. But that's all. I don't do any sports outside of school. ,F: Not even any cycling or walking? ,M: Very rarely. Because my mom takes me to school in the car.
(A) F: Yeah. It's good for your health to go to school by bike, but you enjoy playing sports outside of school, don't you? (B) F: Since you walk to school, you can do five hours of exercise a week. (C) F: I’m sorry, I don’t understand. Could you say it again? (D) F: Then you are so happy that your mother can drive you to school.

Ex Output:
D


Ex Input:
M: I'd like to stay two nights, please. ,F: Do you want full board or half board? ,M: What's the difference? ,F: Full board includes all meals and have forward includes just breakfast and dinner.
(A) M: I would like to stay three nights in your restaurant. (B) M: So you don't provide any meal in your hotel. (C) M:  I don't want to eat in the hotels. (D) M: I am really sorry, I did not catch that. Would you slow down, please?

Ex Output:

C