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: How long have you been living in this city, Jack? ,M: Let me see. I came to this city when I was 23 years old. So 5 years now. ,F: Do you like living in the big city? ,M: Not so much. Air pollution has become such a big problem here now.
(A) F: I agree with you. Heavy traffic is a serious problem. (B) F: I agree with you. Air pollution is not a serious problem. (C) F: I am afraid I did not quite catch what you were saying. Please repeat it. (D) F: I agree with you. Air pollution should be paid more attention to.

Ex Output:
D


Ex Input:
M: Did you hear the news? Reports say that drinking beer is good for your health. I really shouldn't have given it up. ,F: Come on, Peter. You are healthy as well without it.
(A) M: I used to be in poor health because of the beer. (B) M: I didn’t hear you. Please could you tell me again? (C) M: I didn't give up drinking beer so I am in poor health now. (D) M: I used to be a beer drinker, but now I give it up and I am in poor health.

Ex Output:
B


Ex Input:
F: Hi, David. How was your day? ,M: Don't ask, it was terrible. ,F: You poor thing. What on earth happened? ,M: Well, at about 11 o'clock this morning, I was skateboarding in the park. ,F: Oh, yes? Did you see Tony there? ,M: No. Luckily, I didn't see anyone I know. ,F: What do you mean 'luckily'? ,M: To start with, I wasn't looking where I was going and I fell off my skateboard. I landed in a pool. I was really dirty.
(A) F: You felt off your skateboard and you lost your money. That's terrible! (B) F: Haha, You felt off your ice skates. That's terrible but still funny! Haha! (C) F: I am really sorry, I did not catch that. Would you slow down, please? (D) F: You felt off your skateboard and you were hit by a bus. Have you hurt?

Ex Output:

C