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, computer consultants. ,F: Hello, I'm interested in the Nova computer. ,M: The basic model or the basic plus? ,F: Which one is more suitable for a small restaurant? ,M: Well, it depends on what you really need. Both of them have the latest and greatest hardware. ,F: Well, we do need a wide range of software. ,M: Then I think you should consider the basic plus.
(A) F: Just a minute! I do not quite follow what you are saying, would you mind repeating that? (B) F: Please give me more information about the basics plus model. (C) F: I don't need computer, but you're welcome to our restaurant. (D) F: I'm not interested in Nova, but I want to buy a Supernova one.

Ex Output:
B


Ex Input:
M: Hello, E-shop. What can I do for you? ,F: I've just received your catalog and I'd like to inquire about something in it. ,M: Yes, ma'am. What's the product number? ,F: SP 506. ,M: Let me see. Here we are. It's our latest model of electronic dictionary.
(A) F: SP504, yeah. I watched the ad on TV. Can you introduce more to me? (B) F: Oh, yes. I saw the computer on the catalog I received and I want it. (C) F: How much is SP 506? I didn't see any price on the catalog I received. (D) F: I didn’t hear you. Please could you tell me again?

Ex Output:
C


Ex Input:
M: Hi, Helen. Where are you off to? ,F: To the library. I've got a history exam next week and need to start studying, ehh...
(A) M: It sounds terrible that you have an examination today. (B) M: I’m sorry, I didn’t catch that. Would you mind speaking more slowly? (C) M: It's a pity that you must study in the library tomorrow. (D) M: It's a pity that you must study in the library today.

Ex Output:

D