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.

Ex Input:
F: Can I help you? ,M: Yes, I'm looking for a sweater in a medium size. ,F: Let's see. Here is a nice white one. What do you think? ,M: I think I'd rather have it in blue. Oh no, the pink one. It looks better. ,F: OK. Here's pink in a medium. Would you like to try it on? ,M: OK. Yes, I love it. It fits perfectly. How much is it?
(A) F: This white sweater you choose is cheaper than others. (B) F: Let me check. Blue sweater in large size, $40, please. (C) F: I’m sorry, I don’t understand. Could you say it again? (D) F: We only have large-size pink sweater, so there's a discount.

Ex Output:
C


Ex 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?

Ex Output:
B


Ex Input:
M: I'd like to book a flight to New York, please. ,F: Certainly sir, what date? ,M: May first. ,F: May first. Single or return? ,M: Return, please. I'd like a direct flight if possible.
(A) F: A direct train for you to New York, no problem, sir. (B) F: I didn’t hear you. Please could you tell me again? (C) F: A single direct flight to New York on May 31st, got it. (D) F: I'll get you a direct flight ticket to New York, sure.

Ex Output:

D