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: Excuse me, are you going to buy that textbook? ,M: Well, yeah, I need it for a class. But it's awfully expensive. ,F: Oh, we must be in the same class! Civil engineering? ,M: Yes, that's the one! ,F: Were you there last Friday for the first class? ,M: Yes. I only moved here last Monday, and I registered for the class last Tuesday. By the way, I thought Professor Qian really seemed to know his subject.
(A) F: Great. Since you moved here last month, you must have your first class last Monday. (B) F: Yes. It is great that you registered for class last Monday and had your first class last Tuesday. (C) F: His courses are great. You must learnt a lot of Civil Engineering in your first class last Friday. (D) F: I am afraid I did not quite catch what you were saying. Please repeat it.
Example Output: C

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: F: Have you seen our waiter? ,M: Sure, he comes now! ,F: We've been sitting here for almost 10 minutes. ,M: Whoops! I guess I was wrong. That isn't our waiter. ,F: We can give him 5 more minutes and then leave.
(A) M: I'm sorry that we have waited for the manager for almost 20 minutes. (B) M: There's no need to stand it. We should order without our friends. The waiter has been here for several times. (C) M: I’m sorry, I didn’t catch that. Would you mind speaking more slowly? (D) M: Uh, maybe we need to wait the waiter a little longer.
Example Output:
D