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: Gosh, we've been waiting for ages? What's the matter? ,M: Who knows? It always leaves on time more or less. But in the middle of winter, you have to expect the delay here sometimes. In fact, the trains also sometimes get delayed by snow on the lines or the planes by fog on the runway. Actually, it's probably rain that's holding up things for us right now.
(A) F: Yes, the rain may be the reason that the trains get delayed. (B) F: I am afraid I did not quite catch what you were saying. Please repeat it. (C) F: It's probably flog that's holding up things for us right now. (D) F: The weather forecast says the rain has stopped.
Example Output: A

Example Input: F: Hello, Richard. Nice to meet you. ,M: Hi, Barbara. Haven't seen you for ages! ,F: I've just come back from Canada. I was helping in a research program and I stayed in a town near Toronto for 2 months. ,M: Oh, how nice! Did your program go smoothly? ,F: Yes, and I'm going back in March to continue. ,M: Did you enjoy your stay in Canada? ,F: Oh, yes. They were very nice people. I mean, the people I worked with, very friendly and very helpful. ,M: Did you travel a lot there? ,F: No, we were very busy trying to finish the first part before Christmas. But my friends took me to quite a few parties and I never forget the big meal on Thanksgiving Day, and the fun we had on Boxing Day.
(A) M: Ok, I see. You didn't enjoy your stay in Canada and the research program will be finished in March. (B) M: OK, I see. You really traveled a lot there and the research program was finished before Christmas. (C) M: So, part of the research program has been finished and your friends took you to quite a few parties? (D) M: I’m sorry, I didn’t understand. Could you repeat a little louder, please?
Example Output: C

Example Input: F: Can I help you? ,M: Yes, how much for the tie? I love the pattern. ,F: Oh, I love those ties. They're selling well. They're $30.50 each. ,M: The price is a bit high. Have you got anything cheaper? ,F: Well, we do have these simpler red ones on sale, and there are the same brand. ,M: How much are they? ,F: Only $10. It's a great discount.
(A) M: So this red tie is $5 without any discount. (B) M: So this red tie is $30 after the discount. (C) M: I am really sorry, I did not catch that. Would you slow down, please? (D) M: So this red tie is $10 after the discount.
Example Output:
D