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: 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.

Ex Output:
C


Ex Input:
M: How was the airplane ride yesterday? ,F: It couldn't be worse. It was a 12-hour flight and the couple sitting next to me kept talking all the time. ,M: That was really annoying! Why didn't you listen to some music? ,F: My ears ached when I listen to music, so I had to stop listening to music.
(A) M: I am really sorry, I did not catch that. Would you slow down, please? (B) M: It is good that you want to chat with the couple on the train, you can make friends with them. (C) M: Sure. When you travel on a train, your ears will ache when you listen to music. (D) M: I know your ears will ache when you listen to music. You should see the doctor.

Ex Output:
D


Ex Input:
M: Good morning, Swim Shop, Kevin speaking. How can I help you? ,F: Hello, I'd like some information. I have got your order brochure here. Can you give me some prices? ,M: Of course, please tell me the page number you're looking at. ,F: OK. The first thing is on page 14. It the maru swimming cap. The red and blue one. ,M: OK. The small and medium sizes are 22 pounds 65, and the large one is 26 pounds 40. ,F: Right, I'd like to order that, please. Size small.
(A) M: But the medium swimming cap you want is the most expensive size. (B) M: Small-sized white swimming cap from page 12. Your request is noted. (C) M: Let me check if we have small maru swimming cap in stock for you. (D) M: Excuse me, could you repeat the question?

Ex Output:

C