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: You don't look very happy. What seems to be the problem? ,F: I've got to write a long composition for my English class and I just can't come up with any idea and it's due tomorrow.
(A) M: I’m sorry, I don’t understand. Could you say it again? (B) M: You can go to the teacher's office. You can ask the teacher to help you with your French composition. (C) M: You don't look well. Don't worry. You still have many days to prepare for a long composition. (D) M: Maybe, Lily can help you with your long composition in French which is due to tomorrow.

Ex Output:
A


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, Tom Smith. ,F: Hello, Tom, it's Mary Clark. My secretary said you called just now? ,M: Yes. Thank you for calling back. I wanted to make sure you've received the invitation. ,F: Yes, I have. I'd be glad to accept it. ,M: Good. Uh, Mary, some friends of mine are going to say it Glencross for a few days after the celebration. Would you join us for 4 or 5 days? ,F: Oh, I'd love to. But I'm afraid I can't. I've already planned to go to Brussels on the eighteenth. ,M: Well, would you like to stay until the seventeenth? I'm sure you need a break from your busy work. You worked too much.
(A) F: I've already planned to go to Glencross on the eighteenth, so seventeenth is OK. (B) F: I will hold a celebration on 18th. (C) F: I've already planned to go to Brussels on the 20th. (D) F: I am really sorry, I did not catch that. Would you slow down, please?

Ex Output:

D