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:
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: 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
(A) M: Yes, we had planned to meet at 11:30 a.m. Since you can't make it, let's reschedule our appointment at 1:00 pm. (B) M: Have you forgot it? We had planned to meet at about 11 a.m. Since you can't make it, let's reschedule our appointment at 1:00 pm. (C) M: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (D) M: OK, let's postpone our meeting for half an hour. Can we meet at 2 p.m?

Ex Output:
A


Ex Input:
M: Hey, Susan, how's it going? ,F: Terrible. I'm really unhappy at Pat, the house owner. When I came home yesterday, the front door was wide open. The cat was hiding in the closet. And there was Pat. He came to change the pipe. But he didn't even tell me that he was coming. He does this all the time. last month, one day I was throwing a dinner party for 8 people, when I went out for a minute to buy some wine, Pat came to repair the broken light in my bedroom. I nearly had a heart attack when I walked in and found him there.
(A) M: Creepy!  He can't just run into your room and replace the pipe yesterday! (B) M: How terrible! But it is lucky that your flatmate Pat helped you with the electricity yesterday. (C) M: It was your boy friend Pat's duty to repair the broken light yesterday. (D) M: I’m sorry, I didn’t understand. Could you repeat a little louder, please?

Ex Output:

A