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'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: Can I talk to you for a minute, Professor Smith? ,F: Sure, David. What can I do for you? ,M: I didn't get to copy down all the terms you mentioned in today's lecture and I know they were important.
(A) F: I am really sorry, I did not catch that. Would you slow down, please? (B) F: Thank you for trusting me and ask me for help with today's lecture. What kind of problem do you have? (C) F: Robin, I am sorry to know that you have missed all the classes last week, but it will not influence your final grade. (D) F: It is good that you want to learn how to take notes. Since there is no lecture today, let's review last week's class.
Example Output: B

Example Input: F: Can I help you? ,M: Have you got anything that tells people how to take care of their eyes? ,F: Yes, we have. ,M: Good. How much is it? ,F: 4 yuan per copy. ,M: That's cheap enough. ,F: How many copies please? ,M: I'll take 2 copies. One for me, one for my brother. ,F: Here you are. That would be 8 yuan in all. ,M: Here's 10 yuan.
(A) F: Well, here's the change four yuan for the comic books you bought. (B) F: Okay, here's the change two yuan. (C) F: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (D) F: Alright, here's the change two yuan for those business magazines.
Example Output:
B