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.

Input: Consider Input: F: Eddie, you've got to come over and see my parrot. It's learning so many words now. ,M: Really? Last time I saw him all he could say was something that sounded like hello. ,F: Well, now, he can a sing a song too. ,M: Which song did you teach him? ,F: Calorie. You know that popular song by a group of girls right? Actually I didn't teach Goby the words. I was dancing to the song on the radio and he just picked it up. ,M: That's a pretty smart bird. I'll come over after school today. Let's take a video of him and put it on line.
(A) F: I’m sorry, I don’t understand. Could you say it again? (B) F: I will send you the link, so you can watch the video online after school today. (C) F: Come to my house after school, I will take videos of you. (D) F: My bird would be waiting for you to teach him more words after school today.

Output: A


Input: Consider Input: F: Hello, China Travel Agency. Can I help you? ,M: Yes, I'd like to travel to London. So I want to make a reservation for me on May fourth. ,F: Just a moment, please. I'm sorry, but the flights are fully booked on that day. The next available flight is on May fifth. They have 2 flights: one at 9:30 AM and the other at 2:00 PM. Both flights have seats available. ,M: That's great. I'd like to take the first available flight. What's the fair, please? ,F: 2250 yuan. ,M: Here is 2300 yuan.
(A) F: Okay, as you want to take the last available flight, you have to pay 2,300 yuan in total. (B) F: Really? You mean here is 3300 yuan? Oh, actually you just have to pay 2,250 yuan in total. (C) F: Just a minute! I do not quite follow what you are saying, would you mind repeating that? (D) F: Well, as you want to travel to London and take the first available flight, you have to pay 2,350 yuan in total.

Output: C


Input: Consider Input: M: What's going on around here? Why is everyone changing offices? ,F: Haven't you heard? Where have you been any way? ,M: I just got back from visiting the factory in Chicago. ,F: Well, there are a lot of changes being made here this week. ,M: Yes, I see. But what are they? ,F: For one thing, Erik and Daniel are leaving. ,M: Where are they going? Did they get a higher position? ,F: Eric is going to the office in New York. He is going to be in charge of the whole eastern market. ,M: That sounds like a good position to him. What about Daniel? ,F: He's going to manage the company in California. ,M: And you? What about you? Are you going to be raised to a brighter position? ,F: Not yet, but I'm hoping I will.
(A) M: Really? You are not hoping you will be raised to a brighter position? Oh, I have just been to California and there are a lot of changes. (B) M: So, now you are going to be raised to a brighter position? Oh, as I have been to Chicago, I haven't learned the news. (C) M: So, you mean Erik and Daniel are not leaving but you are leaving? Oh, as I have been to New York, I haven't learned the news. (D) M: I didn’t hear you. Please could you tell me again?


Output: D