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: Hello, I'm from the students' union. We're doing a survey of students' eating habits. Would you mind if I ask you a few questions? ,M: Not at all. ,F: What's your favorite food? ,M: Hamburgers and french fries.
(A) F: Okay, so you like vegetables and fruits most, your information is very useful to the test we are doing. (B) F: Alright, hamburgers and french fries are your favorite food, and what's your least favorite food? (C) F: I didn't hear you. Please could you tell me again? (D) F: So you like chocolate and cake best, since you mind us asking questions,we won't ask more.
Example Output: B

Example Input: M: And so tired! I've been up late studying for the math exam for the last 2 nights. ,F: I have, too. But I'm so nervous that I can't fall asleep at night. ,M: Maybe you can drink a glass of milk and take a bath before going to bed.
(A) F: I didn't hear you. Please could you tell me again? (B) F: Yes, it is a best way to relax. (C) F: How about your study report? (D) F: Since we have taken too mu time on Chinese exam, I think we should have a good rest.
Example Output: B

Example Input: M: Is Mr Black new here? ,F: Yes. ,M: Do you like him? ,F: Yes, we rarely miss any of his lectures. He's got a good voice. And he often sings to us.
(A) M: Yeah, Mr Black is a good actor although you don't like him. (B) M: Yeah, Mr Black is a good singer although you don't like him. (C) M: I am afraid I did not quite catch what you were saying. Please repeat it. (D) M: Yeah, Mr Black is a good lecturer.
Example Output:
D