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: M: Hey, May, how are you getting to Xi'an next week? ,F: I'm not sure yet. I may take the train, but then again, I may take the bus. ,M: But the bus takes a long time. You could fly. It's not so expensive these days.
(A) F: You have a point. I'm going to check out if it's cheaper to get there by plane. (B) F: It's so nice of you to go there by bus with me together. (C) F: Thank you, I like travelling by train as well. (D) F: I'm sorry, I don't understand. Could you say it again?
Example Output: A

Example Input: M: Mom? ,F: What are you doing here down at the beach? I thought you said you were going to buy some things for school? ,M: Uh, I did buy some things. ,F: Well, what did you buy? What do you have in your backpack? ,M: Let's see, I have 3 notebooks, 5 pencils, 2 erasers and...
(A) F: Why did you buy 2 notebooks and 5 pencils? (B) F: Why did you buy 3 notebooks ? (C) F: Why did you buy 3 notebooks and 5 pencils? (D) F: I am really sorry, I did not catch that. Would you slow down, please?
Example Output: B

Example Input: F: Dave, I'm going to pick up food and drink for Saturday's picnic. Any suggestions? ,M: Well, everyone has been talking about having a barbecue down by the river. So why don't you pick up some hamburger and hot dogs? ,F: OK, but how much hamburger meat are we going to need? And hot dogs, too. ,M: I don't know. How about 3 pounds of hamburger and a couple of packages of hot dogs? ,F: Oh, that's not going to be enough. Do you remember the last picnic in the mountains? Jim, your roommate, ate about 10 hamburgers by himself.
(A) M: I definitely remember that Jim ate 10 hamburgers alone at the last picnic. That's shocking. (B) M: I didn't hear you. Please could you tell me again? (C) M: You remind me. Our teacher Jim prepared a couple packages of hot dogs for the last picnic. (D) M: Indeed. Last picnic was in the park, and Jim ate 10 hamburgers by himself.
Example Output:
A