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: Can I help you, sir? ,M: Yes, I'm here to see the cars. ,F: Thank you. We have many brands. Do you have any particular brand in mind? ,M: Yes, I want to have a Ford. I need it badly for my work. But I don't have a lot of money. It must be very expensive, isn't it? ,F: Yes. Look, this model is newly developed and began to appear in the market just several weeks ago in America. It cost $43,800. But considering the high quality, it's worth it. ,M: That's why I shall choose it. But I'm afraid that I can't afford to pay in cash now. Can I pay regularly for the car in a year? ,F: Oh, yes. You can pay each month or the first time $13,800. And you must pay the remaining part in 12 months.
(A) M: Since, the way of payment is ensured, then please fill these files first. (B) M: I’m sorry, I don’t understand. Could you say it again? (C) M: You don't have to worry about the quality of the car, daddy! (D) M: The function of the car is pretty good, you can have a try my son.

Ex Output:
A


Ex Input:
F: I hope you can come to the party on Saturday. ,M: I didn't know I was invited. ,F: Sure you are, everyone in our office is invited.
(A) M: Thank you, teacher. I am sure our classmates will attend the lecture on Saturday. (B) M: I’m sorry, I didn’t understand. Could you repeat a little louder, please? (C) M: Why you didn't invite our parents to the concert on Saturday? (D) M: Oh, great. So I will meet our workmates there.

Ex Output:
D


Ex Input:
M: It's Tom, mom. I'll be home late. I'm afraid I got caught in traffic. ,F: Oh, what a pity! You'll miss the basketball match tonight. I hope you have your umbrella with you. It looks like it's going to rain.
(A) M: It can't be helped. I can't avoid the heavy traffic. (B) M: It can't be helped. I can't avoid the heavy traffic, but it's fortunate to hear that I won't miss the basketball match tonight. (C) M: I’m sorry, I didn’t catch that. Would you mind speaking more slowly? (D) M: It can't be helped. I'm sorry that I'll be home late because of the basketball match.

Ex Output:

A