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: Excuse me, is there anyone sitting here? ,F: Oh, no, please. ,M: Ah, thanks. Um, it's a long flight. ,F: Yeah, 11 hours.
(A) M: The is a long journey on bus. (B) M: The train we take lasted eleven hours. (C) M: I'm sorry, I don't understand. Could you say it again? (D) M: It's really a long flight which has 11 hours.

Ex Output:
D

Ex Input:
M: Lucy, I'm terribly sorry to hear your mother was seriously ill. ,F: Don't worry so much, grampa. She is much better now.
(A) M: I'm sorry, I didn't catch that. Would you mind speaking more slowly? (B) M: Is she still terribly ill? Sad for her. (C) M: After my operation, your mother is better now. Don't worry. (D) M: Good to hear that your mother has turned much better.

Ex Output:
D

Ex Input:
F: Can you take a look at my math homework? ,M: I'm writing a report at the moment. Mom should be home in a few minutes.
(A) F: I'll write this paper by myself. (B) F: Mother will help you with your homework. (C) F: Excuse me, could you repeat the question? (D) F: I'll ask my mother for help.

Ex Output:
D