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.

Example Input: F: These trousers turned out to be too small for my daughter, so I've brought them back for larger ones. ,M: Certainly, madam. We will take them back if you have your receipt with you.
(A) F: My son said the trousers were too tight for him, so I have to change for bigger ones. (B) F: Here is the receipt. I'll wait here when you change larger trousers. Thanks. (C) F: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (D) F: You are the best tailor nearby. Please make these trousers larger.
Example Output: B

Example Input: M: So Alice, when do you begin? ,F: I start on the twenty-first. I'm hoping to hurry to the coast before I'm too busy. ,M: I don't blame you, you're going to be working long hours, and should get a little rest before it all starts. ,F: We don't actually start working on the first day, but there's going to be some hard training. All new volunteers are required to complete 10 days of training, so I do want to get a little play time before that.
(A) M: So, you think the voluntary work is tiring but you don't want to get a little play time before training? (B) M: So, you think the voluntary work is tiring and you do want to get a little play time before training? (C) M: So,  you think the voluntary work is meaningful although new volunteers are required to complete 25 days of training? (D) M: I am really sorry, I did not catch that. Would you slow down, please?
Example Output: B

Example 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.
(A) F: Yes, you specialize the computer problems although people are doing less and less with computers. (B) F: I’m sorry, I don’t understand. Could you say it again? (C) F: Why do you specialize computer-related injuries and problems? You don't work with computer related injuries and problems, do you? (D) F: Yeah, just as you specializing, there are more computer-related injuries and problems today.
Example Output:
D