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: Hey, May, how are you getting to Xi'an next week? ,F: I'm not sure yet. I may take the train, but then again, I may take the bus. ,M: But the bus takes a long time. You could fly. It's not so expensive these days.
(A) F: You have a point. I'm going to check out if it's cheaper to get there by plane. (B) F: It's so nice of you to go there by bus with me together. (C) F: Thank you, I like travelling by train as well. (D) F: I'm sorry, I don't understand. Could you say it again?
Example Output: A

Example Input: F: Hello, Mr.Smith. This is Janet Bush. ,M: Hello, Miss Bush. ,F: I'm afraid I'm going to be late for our appointment. My friend was supposed to pick me up from the airport, but she just called me and said she is stuck in traffic downtown so she won't be here right now. It's 11 now, so there is no way I'm going to the restaurant at 11:30 as we planned. I wonder if we could reschedule our appointment to sometime this afternoon? ,M: Certainly. What about 2:00 o'clock in my office? ,F: That would be fine. See you then. ,M: See you.
(A) F: Excuse me, could you repeat the question? (B) F: OK. You should be at my friend's house at two in the afternoon. See you. (C) F: OK. I will be your office at 3:00 pm. See you. (D) F: OK. I will be your office on time. See you.
Example Output: D

Example Input: F: Where are my glasses, Frank? ,M: There on your desk. I saw them just now. ,F: Will you go and bring them for me? I can't see anything without them. ,M: OK. Remain seated and I'll go downstairs for them.
(A) F: I don't want to read downstairs. (B) F: Thank you,I can remain sitting upstairs then. (C) F: Thank you. I'll stay sleeping downstairs. (D) F: I'm sorry, I don't understand. Could you say it again?
Example Output:
B