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: Hello. Tenants Advocacy Resource Center. ,F: Hello. I'm having a problem with my house owner. The House owner is a nice enough guy, but he and I just can't seem to agree on repair costs.
(A) M: I' m sorry. Are you just calling to complain about you husband? (B) M: Welcome to the government hall. What kind of help do you want? (C) M: Please clarify your problem further, we will try our best to help you. (D) M: Just a minute! I do not quite follow what you are saying, would you mind repeating that?

Ex Output:
C


Ex Input:
M: Hi Miya, how are you? ,F: I'm very well, thanks. But I'm crazy busy these days. How are you? ,M: Fine, thanks. Why are you so busy? ,F: I have a Chinese test next week.
(A) M: So you are busy with your Chinese study for the commming exam this Friday. (B) M: Which level of the Chinese test you will have next week? (C) M: I didn’t hear you. Please could you tell me again? (D) M: Why do you want to go to the cafe? You are so free these days.

Ex Output:
B


Ex Input:
F: Our guest today is Dr. Lia Kwan. Dr. Kwan works with computer related injuries and problems. Dr. Kwan, do you see more computer-related problem these days? ,M: Oh, definitely yes. People are doing more and more with computers and that means more physical problems. ,F: So what can we do? ,M: Well, how you sit at the computer is very important. First, have a good chair. It should support your back well. ,F: OK, a good chair. ,M: And also your feet should be flat on the floor when you're sitting. You shouldn't cross your legs. ,F: OK. I don't always keep my feet flat on the floor at the computer. ,M: I know, it's hard sometimes. Anyway, you shouldn't sit too close to the screen either. ,F: Is half a meter away enough? ,M: Not exactly. You should sit about an arm's length away.
(A) F: But need we have good chairs? You don't suggest yet. (B) F: Why don't suggest us if we should keep our feet flat on the floor. (C) F: I didn’t hear you. Please could you tell me again? (D) F: Ok, I will remember that not only good chairs doesn't be suggest but also the crossing our legs.

Ex Output:

C