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.

Example Input: F: I know you pay a lot of attention to exercise in your daily life. Could you tell me something about exercise? ,M: OK. I'm just interested in exercise. The importance of exercise is nothing new. Thomas Jefferson once wrote that to be successful and academic studies, a person should give about 2 hours everyday to exercise. ,F: 2 hours every day? I can't do that. ,M: Most experts today do not demand 2 hours of daily exercise. They recommend that people get 60 minutes of moderate to vigorous physical activity most days of the week.
(A) F: Well, I see, jogging for 2 hours everyday is pretty challenging, but I'll have a try. (B) F: Well, I don't think doing exercise for 1.5 hours every Monday is tough. (C) F: Okay, reading for 1 hour everyday is not hard, I think I can do that. (D) F: Excuse me, could you repeat the question?
Example Output: D

Example Input: F: I'm surprised to see you here. Jeremy told me that you were on vacation. ,M: Yeah. We were visiting some relatives in Sydney, but we return last night. ,F: Oh, I've wanted to go to Australia ever since I was little. Tell me what it was like. ,M: It was wonderful. We fed kangaroos, walkthrough rainforests and swam in the ocean. What was really great was when we took a train to Brisbane to see the Great Barrier Reef.
(A) F: I went to Australia when I was a child, but I didn't expect that the most impressive thing for you was to feed kangaroos. (B) F: Why is walking through the rainforest the most impressive thing for you? I've lived in Australia since I was a child, and I don't think the rainforests are impressive. (C) F: So visiting the Great Barrier Reef is the most impressive thing for you? (D) F: I am really sorry, I did not catch that. Would you slow down, please?
Example Output: C

Example Input: M: Did you meet your new woodwork teacher today? I think I saw him when I was dropping you off at school. ,F: Did he have a beard? ,M: He had some hair around the sides of his face, but no beard. ,F: You must have seen my art teacher. ,M: I never notice the man with a beard walking in. I also saw a man with no hair at all, though. ,F: That's Mr Thomas, dad. He teaches history.
(A) M: I see. Your history teacher has a beard. So does your art teacher. (B) M: Oh. Mrs. Thomas does not have hair. She teaches you history. (C) M: OK. So your history teacher has no hair at all. It is cool. (D) M: I am really sorry, I did not catch that. Would you slow down, please?
Example Output:
C