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: M: Lily, I can't catch up with the English teacher very well. ,F: What's the problem? ,M: You are quite good at English. Can you help me with it? ,F: Sure, but you'd better take an additional course in some English schools. ,M: English schools? What's that? ,F: This kind of school is good at helping people to improve their English. ,M: Is that different from our school's English course? ,F: Yes. Before you start your training, they will test you on your English first. ,M: Then? ,F: Then they will recommend you the class that suits you. ,M: Really? How good can my English get there? ,F: You see how well I am doing. I studied there, too. ,M: Alright. I'll tell my father about it.
(A) F: I am really sorry, I did not catch that. Would you slow down, please? (B) F: Yes. I think you should go to the English schools. It's really helpful. (C) F: Why are you going to the English school? Although it's helpful to me, it doesn't suit you. (D) F: I don't know you but I find the additional course in English schools is easy but not helpful.

Output: B


Input: Consider Input: M: Lisa, why do you keep a night light on in your room? ,F: I thought you knew that I'm scared of the dark.
(A) M: If you're not afraid of the dark, why keep all the lights on at night? (B) M: I didn’t hear you. Please could you tell me again? (C) M: Why keep a night light in your room at night when you are not afraid of the dark? (D) M: Now I know why you turn on a night light in your room at night.

Output: D


Input: Consider Input: M: How do you spend these long winter evenings, Maggie? ,F: At home. I don't go out in winter. It's warm and pleasant indoors and I hate going out in the cold. ,M: Do you find it rather boring staying at home? I like going to cinemas in theaters.
(A) F: I didn’t hear you. Please could you tell me again? (B) F: Oh, I don't know that you like reading books. Maybe sometimes we can read together. (C) F: Not at all. But it seems that you enjoy walking in the cold winter evenings. (D) F: Oh, no. I enjoy myself. And why do you never go to the cinemas or theaters?


Output: A