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: Would you consider buying a self-driving car? ,F: I don't know. I guess I'd have to research a bit more about them before making that decision. ,M: It will probably be a while before we are able to buy them anyway. We might be seeing self-driving trucks on the road pretty soon, though. Google wants to change the commercial trucking industry. Right now, there are over 3 million truck drivers in the US, so adding self-driving trucks would likely take away a lot of jobs. But many drivers might still be able to accompany their trucks and get a full night's sleep in the process. ,F: Truck drivers cause a lot of accidents on the freeway, so I think I'd like to see self-driving trucks. It would make me feel safer on the road. ,M: Really? I think it might make me feel less safe. A human driver is much more likely to react quickly to something unexpected.
(A) F: I am not agree with you, I don't think they are safer. (B) F: I am really sorry, I did not catch that. Would you slow down, please? (C) F: I am not excited by their speed because I think they are not safe at all. (D) F: Are you serious? I don't understand why you feel scared by them.

Ex Output:
D


Ex Input:
F: Can I help you? ,M: Yes, I'm looking for a sweater in a medium size. ,F: Let's see. Here is a nice white one. What do you think? ,M: I think I'd rather have it in blue. Oh no, the pink one. It looks better. ,F: OK. Here's pink in a medium. Would you like to try it on? ,M: OK. Yes, I love it. It fits perfectly. How much is it?
(A) F: This white sweater you choose is cheaper than others. (B) F: Let me check. Blue sweater in large size, $40, please. (C) F: I’m sorry, I don’t understand. Could you say it again? (D) F: We only have large-size pink sweater, so there's a discount.

Ex Output:
C


Ex Input:
M: Mom, I've cleaned the bedrooms, the kitchen except for. ,F: I know, the living room, right? Don't worry. I'll clean it.
(A) M: Thank you so much for cleaning the living room. (B) M: You need to clean the bedroom because I didn't clean it. (C) M: Thanks for cleaning the kitchen, mom. I'll do it next time. (D) M: I am afraid I did not quite catch what you were saying. Please repeat it.

Ex Output:

A