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: Hi, my name is Catherine. ,M: I'm John. It's nice to meet you. ,F: Do you know what this professor is like? ,M: I have no idea. This is my first year. ,F: You are a freshman? Me too. Where are you from? ,M: I'm from San Francisco.
(A) F: I've been there a few times. Now we are schoolmates, I can go there more often. (B) F: Oh, yeah, we met there and became friends since then. (C) F: Oh, yeah, I asked you the same question last year. (D) F: I'm sorry, I don't understand. Could you say it again?
Example Output: A

Example Input: F: I feel horrible, Daisy was angry at me because I lost her notes, do you think I should apologize again? ,M: If I were you, I'd let her calm down a few days before I approach her. ,F: Maybe you're right.
(A) M: Yes, you can write Daisy a note of apology. (B) M: You must return Daisy's notes in a few days. (C) M: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (D) M: You should make apologize to her a few weeks later.
Example Output: C

Example Input: M: Good afternoon, Madam. ,F: Good afternoon, Praveen. What can I do for you? ,M: I need to get some information on animal cells. ,F: What is it for, Praveen? ,M: I have to make a presentation of animal cells in the discussion next week. ,F: That's fine. ,M: Could you tell me where I can get it, Madam? ,F: Look at that last cupboard. It's marked reference. ,M: Do you mean the one next to the literature cupboard? ,F: Exactly. There are a number of books in that cupboard. You will find children's science book there. That's the right book for your reference. ,M: Oh, I see. May I borrow it for a day or 2? ,F: Sorry. The reference books are not for lending.
(A) M: So reference books can't be kept for more than 2 days, right? I will keep it for only one day. (B) M: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (C) M: OK. I know that literature books can't be lent out. I will read it right here. (D) M: OK. I know that reference books can't be lent out. I will read it right here.
Example Output:
D