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:
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?

Ex Output:
D

Ex Input:
M: Did you hear about the fire at the department store? ,F: Yes, it's reported that the building is in ruins. ,M: That's right. It went up like a matchbox. There was nothing they could do to save it.
(A) F: I'm sorry, I didn't understand. Could you repeat a little louder, please? (B) F: Luckily the fire didn't destroy the buildings. (C) F: This matchbox is nice, but I haven't heard about the fire. (D) F: This fire is terrible.

Ex Output:
D

Ex Input:
F: Excuse me. Is this seat taken? ,M: No, it's not taken. Did you just get on? ,F: No, no. I just changed my seat. A man next to me was smoking and smoke really bothers me. ,M: Let me help you with the suitcase. ,F: Oh, thank you. ,M: Do you want to sit by the window? ,F: No, no, no. I like this seat better. ,M: My name is Green. Lawrence Green. Pleased to meet you. ,F: I'm Elizabeth Tobin. Pleased to meet you, too. ,M: Do you live in New York? ,F: No, I'm from Florida. I go to visit my sister. She moved several times before settling in New York.
(A) M: Oh! You come from New York to visit your aunt Alice! (B) M: Excuse me, could you repeat the question? (C) M: You must have a hard time visiting your sister in New York from Florida. (D) M: Well! You came to Beijing from Florida just to see your aunt!

Ex Output:
C