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: Jim, can you help me fill these forms? My assistant has been ill and went to see the doctor just now. ,M: Just tell me what needs to be done. I'm free till the 4:00 o'clock meeting begins.
(A) F: It's so nice of you. Form 1-4 need to be filled in. Take your time. (B) F: You are a life saver! My assistant is attending the meeting and is not available now. (C) F: It's so nice of you. My assistant will be on sick leave and is going to see the doctor tomorrow. (D) F: I’m sorry, I didn’t understand. Could you repeat a little louder, please?
Example Output: A

Example Input: F: Was yesterday's meeting held in room 305? ,M: 305 was occupied and the computer in 306 was out of order, so we moved to 307.
(A) F: Since the computer in room 305 was out of order, why was the meeting held in room 305? (B) F: Since room 306 was occupied, why was the meeting still held in room 306? (C) F: Because room 306 is occupied, the meeting was held in room 307, right? (D) F: I’m sorry, I didn’t understand. Could you repeat a little louder, please?
Example Output: D

Example Input: F: How long have you been living in this city, Jack? ,M: Let me see. I came to this city when I was 23 years old. So 5 years now. ,F: Do you like living in the big city? ,M: Not so much. Air pollution has become such a big problem here now.
(A) F: I agree with you. Heavy traffic is a serious problem. (B) F: I agree with you. Air pollution is not a serious problem. (C) F: I am afraid I did not quite catch what you were saying. Please repeat it. (D) F: I agree with you. Air pollution should be paid more attention to.
Example Output:
D