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: 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.

Ex Output:
D


Ex Input:
M: Is there a city where it's always warm? ,F: Yes, there are many cities where it's almost always warm. San Diego for example. ,M: Are there any other cities where it's always hot? ,F: Yes, there are quite a few. Most of the cities in the southern part of the United States are hot all year.
(A) M: I see. Most cities in the western part of China are always hot. (B) M: I know that cities in the southern part of China is always hot. (C) M: Excuse me, could you repeat the question? (D) M: It seems that most cities in the southern part are hot all year around.

Ex Output:
D


Ex Input:
F: Good afternoon, do you know where the subway station is? ,M: It's down the street about 2 blocks away. ,F: I've never been to this city before, so I'm not familiar with the city. Can I find it easily? ,M: I think so. Just walk down the street for about 5 minutes and you'll see a sign for it right in front of a post office. Keep walking for about 10 minutes and you'll be at the subway station. So, are you here to visit friends or for business? ,F: Actually, I'm with 2 friends to go sightseeing. We got separated while we were shopping in the mall, so they went to the train station and are now waiting for me there. ,M: Well, I hope you have a good time here in this city.
(A) F: I'm here to visit a friend. Thanks. (B) F: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (C) F: I had planned to come here for sightseeing, but suddenly I changed my mind and went to see a friend. Thanks. (D) F: I'm here to do some sightseeing. Thanks.

Ex Output:

D