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: M: Have you ever taken History 231? ,F: Yeah, last term. ,M: Who was the professor? ,F: Professor Johnson. ,M: I have him this semester. What do you think of him? ,F: He's a terrible instructor and demands a lot, but fortunately we can get high scores easily in his class. ,M: What did you get? ,F: I got an A, but none of my test scores were that high. So I don't know how I got such a good score. ,M: Really? I was about to give it up, but after hearing your experience, I think I will continue to stay in the class. ,F: You will get a better grade than your test scores. ,M: Thanks for the information. I feel relieved now.
(A) F: You are welcome. Wish you well in the new class. (B) F: You are welcome. Just go and have a talk with Professor David. (C) F: No worries, stay and you will get a good score. (D) F: I’m sorry, I don’t understand. Could you say it again?
Example Output: C

Example Input: F: Hi, Mr. Matthew. This is Susan Millers speaking from Chicago. Now we'd like to place an order with you. ,M: Oh, very glad to hear that. When can you send your purchase order? ,F: We will send it as soon as possible. We hope you can hurry on the order. ,M: No problem. But I'll have to check another purchase order, which is to be finished this Friday. Now I'm in Shanghai on business. Anyway, I'll let you know when I come back, and then we can sign a contract. ,F: Thanks. ,M: Well, I'm afraid we can't send the products until after the Christmas Holidays. We will begin our holiday in New York next Tuesday and our company will be closed for 2 weeks. ,F: That's alright. We'll try to have a meeting for the details of the order and send it to you this Thursday. I hope you tell your market manager about it. ,M: OK. Once we get our purchase order, we will begin preparing your bookings. ,F: Thanks. We need the products in one month. ,M: Fine.
(A) F: Thank you, we hope to receive them in 3 days. (B) F: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (C) F: Thank you. Can we receive them in two weeks? (D) F: When do you expect to receive the products? In one month?
Example Output: B

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