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: That looks nice. I'll have a cheeseburger and fries. ,M: Anything to drink? ,F: A chocolate milkshake. ,M: That'll be $2.75.
(A) F: Here it is, and you need to give me $2.65 change. (B) F: OK, here's $2.75 for the food and drink. (C) F: $2.75 for a milkshake? That's expensive. (D) F: I didn't hear you. Please could you tell me again?
Example Output: B

Example Input: F: Have you chosen the music for the party yet? ,M: I was going to just let people bring their own. ,F: Oh, I don't think you should do that. One person needs to be in charge. Otherwise, people will start disagreeing. Sony's really good at music. You could ask her. ,M: OK. Have you got her number? ,F: Yeah, it's on my mobile. I'll text it to you.
(A) M: You have helped me prepare for the party. The party is a great success. (B) M: Thank you for asking Sonia for the information of the party. (C) M: I know Sony's phone number, but thank you for offering to tell me. (D) M: I didn't hear you. Please could you tell me again?
Example Output: D

Example Input: M: Betty, fancy seeing you here. I didn't know you took the underground. ,F: I don't usually. It's just that I'm fed up with driving and paying so much for gas and the buses are crowded and unreliable, so I thought I'd give this a try. ,M: I know what you mean. I started taking the subway 2 years ago and it's wonderful. Both my home at her office are within easy reach of the stations. When I was driving, I wasn't getting nearly as much exercise.
(A) F: Well, let's get back to work and I'll drive you home afterwards. (B) F: I know! Taking the underground has so many benefits! (C) F: Just a minute! I do not quite follow what you are saying, would you mind repeating that? (D) F: I guess you are right, but I just love driving to work.
Example Output:
B