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: Excuse me, could you tell me how to get to the Water Cube from here? ,M: You can take a bus or a taxi. But the traffic is very heavy at the moment. So you'd better take the subway.
(A) F: Thanks for the advice, I'm definitely going to take the subway. (B) F: I take the subway to school every day. (C) F: You mean I should take a bus? (D) F: I’m sorry, I don’t understand. Could you say it again?

Ex Output:
A


Ex Input:
M: Doesn't that cloud look like a bear? ,F: No, it looks like a dog to me. That one over there looks like a bear.
(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: You are right. The first cloud looks like a dog. (C) M: Yes. The first cloud looks like a cat to me as well. (D) M: Yeah. The second cloud you said looks like a dog.

Ex Output:
B


Ex Input:
M: We're going to listen to a lecture about environmental protection. ,F: Really? I thought we were going to see an exhibition.
(A) M: No, that's tomorrow. Now we are attending a lecture about wildlife protection. (B) M: Yeah, the exhibition that we are about to see is about wildlife protection. (C) M: I’m sorry, I didn’t catch that. Would you mind speaking more slowly? (D) M: No, we will go see the exhibition tomorrow.

Ex Output:

D