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: Facebook just reported that everyone in the world is only separated by an average number of 3.5 people. ,M: Wow, that doesn't seem possible! I thought the number was supposed to be 6. ,F: That's what scientists originally thought. I think we're all connected even more than Facebook reported actually. The report only included connections between those with a Facebook account.
(A) M: Facebook just reported that everyone in the world is only separated by an average number of 7 people but they don't like to share their lives. (B) M: I’m sorry, I didn’t catch that. Would you mind speaking more slowly? (C) M: You think people in the world are closely connected. (D) M: Facebook just reported that everyone in the world is only separated by an average number of 7 people because scientists don't understand social connection.

Output: C


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: Talking about the twenty first century, I think there will be huge changes in the way people use cars. Laws will be made about what kind of car you can own, and when you can use it. ,F: Maybe there'll just be too many of them on the roads. The air will be so seriously polluted that nobody will be able to breathe normally. ,M: Exactly, people will have to rely on trains. ,F: Why do you say that? ,M: Well, we won't be able to use cars and the airports take too much space. That leaves trains. ,F: Huh? So do you think there'll be more efficient train systems between cities? ,M: Sure, they'll enable people to travel between cities in a matter of hours. There may even be trains going under oceans to connect the main continents. ,F: Under the oceans? Get out of there, I get nervous enough flying on a plane.
(A) M: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (B) M: Really? You get nervous enough taking the train and you think travelling by train under the ocean is frightening? Okay, I see. (C) M: Really? You get nervous enough flying on a plane and you think travelling by train under the ocean is frightening? Okay, I see. (D) M: Yeah, they enable people to travel between cities in a matter of mintues. And you mean travelling by train under the ocean is unimaginable?


Output: C