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:
M: Hello. This is the China Telephone Company. What can I do for you? ,F: Is this the Complaints Department? ,M: Yes, it is. ,F: I want to complain about the bill I received this month. I don't think I've made that many phone calls. Have their rates gone up? There must be a mistake in your billing.
(A) M: Why do you think the telephone bill was not accurate? How much is ti? (B) M: Yes, your telephone line was always busy. But you still got a low bill, that's strange. (C) M: Do you mean that the telephone call was not clear. As IT department, I'll help you to solve it. (D) M: I'm sorry, I didn't understand. Could you repeat a little louder, please?

Ex Output:
A

Ex Input:
F: Good afternoon, sir. Can I help you? ,M: Yes, we need a room for the night. Have you got any rooms available? ,F: Yes. What do you like a single room or a double room? ,M: A double room. ,F: How many nights would you like to stay? ,M: We're only staying overnight. We'll check out tomorrow morning.How much is it? ,F: It's $68 per night.
(A) M: As I'll stay for two nights, it's $136 in total. (B) M: Then I need to pay $68 for the single room. (C) M: Just a minute! I do not quite follow what you are saying, would you mind repeating that? (D) M: So, $204 a night for my single room. Alright.

Ex Output:
C

Ex Input:
M: Excuse me, I am writing an essay about ancient Greece. Are there any books on this topic that you can recommend? ,F: Geese? You want to write about ancient geese? I've never heard of such a thing. Anyway, it would be with a book of some animals, that's row J. Or you want to try science, that's in Row G. ,M: Animals? But Greece is a country, not an animal. ,F: Oh, Greece. Well, you know, today must be your lucky day. We have just received a new collection of books on that very topic. There are writers over here in row C. ,M: I see. That's a lot of books, which do you suggest? ,F: Well, the one by Robin Smith is excellent but it is very long. It's the one with the statue on the cover. There is also one by Milton Pike. It has a painting of a soldier on the front. As you can see, it's not very thick, so it shouldn't take too much time to read. But probably the best book is the one with the picture of ancient Olympic Stadium. It has won several history works rewards. ,M: Well, it's hard to decide, but I'm afraid I don't have enough time for a lot of reading. I think I'll get the book by Milton Pike. ,F: OK. Could I have your library card please?
(A) M: Sure. I don't have much time to read, but I'll choose the longest one. (B) M: Sure. I don't have much time to read, so I'll choose the shortest book. (C) M: I am afraid I did not quite catch what you were saying. Please repeat it. (D) M: Sure. I'll choose the shortest book because the book has won many awards.

Ex Output:
B