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: When does your flight take off, Mary? ,F: At 3:15 PM. There are just 2 hours left so I'm leaving now.
(A) M: I’m sorry, I don’t understand. Could you say it again? (B) M: I didn't realize it is 1:15 p.m. now. (C) M: It's 2:15 p.m. now. Your flight will take off in two hours. (D) M: It's 3:15 p.m. now. Your flight has taken off, hasn't it?

Ex Output:
B


Ex Input:
F: I'm planning to go to Canada on vacation. ,M: What places are you going to visit? ,F: First, I'll spend a few days in Vancouver. Then I'll take a train through the Rocky Mountains. ,M: Oh, you're riding through the Rocky Mountains. That's really exciting. ,F: Then I'll fly to Toronto and take a bus to Niagara Falls. I will take a boat under that huge waterfall. ,M: Wow, that's wonderful. You're so lucky! ,F: Well, I hope I don't get seasick. I'll finish my trip in Nova Scotia. I'd like to bike around some small fishing villages. ,M: Have a great time and take lots of pictures!
(A) F: Thank you. I really had a wonderful experience yesterday. (B) F: I am reading an introduction to Canada, but I will not go to Canada. (C) F: I’m sorry, I don’t understand. Could you say it again? (D) F: Thanks a lot. My travel plan is perfect. I will have a good time.

Ex Output:
D


Ex Input:
F: Merry Christmas! ,M: Thank you. The same to you. ,F: Do you have any plans? ,M: I have been invited to a friend's party, but I want to go to my uncle's. And you? ,F: My roommate is having a party. I'll go there. ,M: Great! Watching TV or sleeping at home is really boring. ,F: Yes. Did you know that there would be a school sports meet next week? ,M: Really? I had no idea. I like watching the track and field events. They're really exciting.
(A) F: The anniversary will be held next week. (B) F: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (C) F: The school sports meet will be held next month. (D) F: The school sports meet will be held tomorrow.

Ex Output:

B