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.

Input: Consider Input: F: Good morning, young man. What's your name, please? ,M: My name is Zhang Ming. I'm 12 years old now. Can you introduce your doctors? ,F: We doctors in this hospital fly to different poor places. People with eye problems can come to us. We give medicine to the poor or do operations on them free. ,M: I started to have problems with my eyes when I was 7. Now I can't see things clearly. Can you help me? ,F: Yes, of course. We'll try our best. ,M: My parents don't have enough money for the medicine or the operation. ,F: Don't worry. We get donations from all over the world. You don't have to pay.
(A) M: Really? If I don't need to pay much, I'm willing to receive treatment right now. (B) M: I'm afraid that I couldn't pay a lot of money to treat my sister's eye problem. (C) M: I didn’t hear you. Please could you tell me again? (D) M: My sister will be very happy if she know she can cure her eye for free.

Output: C


Input: Consider Input: M: Excuse me, can I join the library? ,F: Are you a student of our college? ,M: No, I'm not. But I hear that it's open to the public. ,F: That's right. ,M: OK. Does it cost anything to join? ,F: Well, it's free for students of our college while it is 125 pounds per year or 35 pounds per quarter for the public.
(A) M: I am really sorry, I did not catch that. Would you slow down, please? (B) M: That means if I pay by year, it will save me 15 pounds a year. Sounds good. (C) M: Wow, that will save me 25 pounds if I pay by month! That's a real bargain. (D) M: Sounds good! I just pay 35 pounds for the whole year! I'd like to join this library.

Output: B


Input: Consider Input: F: John, it's raining outside. Take the umbrella with you. ,M: But it's yours. What will you use if I take it away? ,F: Never mind. I can use the raincoat. Besides, I won't have to go out today.
(A) M: Excuse me, could you repeat the question? (B) M: You're so nice. Then I'm going to use your umbrella. (C) M: Alright, I'll take your umbrella and we can go out together. (D) M: Thank you for lending me your raincoat.


Output: B