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.

Example Input: F: I must leave early tomorrow, so it will be difficult to take you to school in the car. ,M: Oh, my bike is in the repair shop, so I guess I'll have to take a bus.
(A) F: So, you mean your bike is not in the repair shop and you will go to school tomorrow by car? (B) F: Really?  Your car is in the repair shop and you will go to school tomorrow by bus? (C) F: Oh, you mean your bike is in the repair shop and you will go to school tomorrow by bus? (D) F: Just a minute! I do not quite follow what you are saying, would you mind repeating that?
Example Output: C

Example Input: F: The children have been playing in the mountains for a long time. Why haven't they come back? I am really worried about them. ,M: Look at the sky. Black clouds are gathering and strong winds are blowing. It seems a heavy rain will fall soon. ,F: They haven't brought anything to protect themselves. They will be caught in the rain I think. ,M: Don't be worried too much about them. Anyhow, they're old enough now. They ought to be able to take care of themselves. ,F: I'm afraid they will catch a cold if they are caught in the rain. You see it's a little cold now.
(A) M: I’m sorry, I don’t understand. Could you say it again? (B) M: Don't worry, they will not be caught in the heavy rain. It is sunny outside. (C) M: You can ask them if they pass the exams directly, they are in their bedrooms. (D) M: Don't worry about the children, they won't be caught in the heavy rain.
Example Output: D

Example Input: F: Hi, Bob. Come in! This is my new office. ,M: Wow, it's great. There's so much furniture, a sofa, arm chair. ,F: How about my desk? Isn't it beautiful? ,M: Yes, look at that. Is that a new computer? ,F: Yes, it is. The latest model. ,M: But there aren't any windows here. ,F: No, no. There are some windows. There over there. ,M: Is that New Times Magazine on your desk? ,F: Yes, it is. There are some more copies in the cupboard. ,M: It's a great magazine. I love it. ,F: Yes, lots of good information. Would you like a cup of coffee? ,M: Sure. Is there a coffee maker here, too? ,F: Yes, there is. I have everything in this office. ,M: You're lucky. ,F: Yes, I am. You're welcome anytime. Now, let's make the coffee.
(A) M: Just a minute! I do not quite follow what you are saying, would you mind repeating that? (B) M: I am very greatful for the your hand-made coffee. Again, it is really a great new office with everything well equipped. (C) M: Are you sure you will lend your computer to me? Thank you so much. Though it is an old one, I am really in need. (D) M: Thank you, but you don't have to make a cup of coffee. It would be inconvenient for you since you don't have a maker.
Example Output:
B