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: M: Don't worry about your train sickness. I have brought some tablets with me that prevent train sickness. Here, take this one now. I'm sure you'll be alright on the train. ,F: It's very kind of you. By the way where is the dining car? ,M: The dining car is next to the sleeping car. Shall we eat our meals in the dining car? ,F: The attendant will bring some food here. But since the dining car is next to this carriage, we may just as well eat there. ,M: That's alright. How beautiful the scenery is. Look at the vast stretches of green fields. ,F: But it looks lovely only at this time of the year. It's rather dull and lonely in winter. ,M: That's why I prefer to travel in the summer and autumn. ,F: Me, too. I love summer, though it is hot.
(A) M: Really? You don't love summer, so you travel in winter now? (B) M: Yeah, I also don't prefer to travel in the summer or autumn, so I travel in spring now. (C) M: I'm sorry, I didn't understand. Could you repeat a little louder, please? (D) M: Really? You love summer because it's not hot? And that's why you travel in summer now?
Example Output: C

Example Input: F: Hello, Mr.Smith. This is Janet Bush. ,M: Hello, Miss Bush. ,F: I'm afraid I'm going to be late for our appointment. My friend was supposed to pick me up from the airport, but she just called me and said she is stuck in traffic downtown so she won't be here right now. It's 11 now, so there is no way I'm going to the restaurant at 11:30 as we planned. I wonder if we could reschedule our appointment to sometime this afternoon? ,M: Certainly. What about 2:00 o'clock in my office? ,F: That would be fine. See you then. ,M: See you.
(A) F: Excuse me, could you repeat the question? (B) F: OK. You should be at my friend's house at two in the afternoon. See you. (C) F: OK. I will be your office at 3:00 pm. See you. (D) F: OK. I will be your office on time. See you.
Example Output: D

Example Input: F: In Britain, we are often told that people are leaving the big cities to live in the countryside, but is this the same worldwide? ,M: Not at all. If you look at the biggest cities in one thousand nine hundred and fifty, 7 out of the top 10 were in the developed countries. But by the year two thousand, the developing countries will have 8 out of top 10. New York, which in one thousand nine hundred and fifty, was number one with a population of around 12,000,000 will only be the sixth the largest city in the world, but with an extra 2 million. ,F: And London? ,M: London, which was number 2, won't even be in the top ten, its population in one thousand nine hundred and fifty, by the way, was about 10,000,000. ,F: And why is this happening? Why are people moving to the big cities from the country in the developing countries? ,M: The reasons are various, but many are moving to look for work and the problems caused by this are enormous. It said the 26,000,000 people will be living in Mexico City by the year two thousand, with Sao Paulo in Brazil, not far behind. ,F: It's hard to believe. ,M: I know. Well, just imagine the difficulties this is going to cause in terms of health, transport, an education.
(A) F: So in these reasons for population growth, there is no mention of housing, is there? (B) F: Excuse me, could you repeat the question? (C) F: It said the 36,000,000 people will be living in Mexico City by the year two thousand, why didn't you mention that transportation is also the cause of population growth? (D) F: Although London has a population of 20 million since 1950, there is no mention of housing among these reasons for population growth. Why?
Example Output:
A