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: M: Welcome back to your student union radio station. I'm with Catherine, who just successfully climbed the Great Mountain, Mont Blanc. Actually, she once did. The same climb in 2007. Catherine, was it easier the second time around? ,F: In many ways. They were totally different experiences. The first time I went as part of an organized group. We took 4 days to reach the top. This year, I decided to go alone with just one overnight stop, actually you're never really alone. It's all been crowded up there. The first climb, was quite difficult is the weather was very changeable, and we found ourselves climbing in very cold windy conditions. The weather this time was wonderful. Plus. I spent a few days before in chamonix and got myself more used to the height. If it's certainly made it easier, you can also achieve the same thing by climbing some of the smaller mountains first.
(A) M: You are used to climbing mountains in a group, and you never climb alone. (B) M: I'm sorry, I didn't understand. Could you repeat a little louder, please? (C) M: You are so brave that you successfully climbed the Mont Blanc on your own. (D) M: You climb mountains with a guide? No wonder you just took 2 days to reach the top.
Example Output: C

Example Input: F: The countryside was wonderful. I like the fresh morning air. ,M: Yeah. As for the village we went to yesterday, there was so much fog around. I think it was a good place for an adventure film.
(A) F: Just a minute! I do not quite follow what you are saying, would you mind repeating that? (B) F: I hope our trip is perfect. There was not so much fog around the village. (C) F: You are right. What a wonderful trip. I love the fresh morning air. (D) F: Yes. I prefer this photo about the village where there was not so much fog.
Example Output: C

Example Input: F: Hi, Mark, how are you? ,M: Actually I'm really fed up. It's about Jane. I want to be friends with her, but I just don't know how to make her notice me or ,F: Wait a minute. Look, Jane is in your chemistry class, isn't she? You are good at chemistry. You could offer to help with her chemistry homework. How about that? ,M: But she is better than me at chemistry. ,F: OK, well, there's a party at David's house on Friday night. You could invite her to go with you.
(A) M: I have too much chemistry homework to do. I feel so unhappy. (B) M: Yes, she is my PE class. (C) M: I am really annoyed with the Friday night party. (D) M: I'm sorry, I don't understand. Could you say it again?
Example Output:
D