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: How long have you been living in this city, Jack? ,M: Let me see. I came to this city when I was 23 years old. So 5 years now. ,F: Do you like living in the big city? ,M: Not so much. Air pollution has become such a big problem here now.
(A) F: I agree with you. Heavy traffic is a serious problem. (B) F: I agree with you. Air pollution is not a serious problem. (C) F: I am afraid I did not quite catch what you were saying. Please repeat it. (D) F: I agree with you. Air pollution should be paid more attention to.

Output: D


Input: Consider Input: F: Jerry, were you late yesterday? ,M: Yes. As I was leaving for work, my wife told me she had a fever. So I took her to the hospital. ,F: I'm sorry to hear that. Is she better now? ,M: Yes, a little. Thank you.
(A) F: So you had a fever yesterday. Your wife sent you to the hospital, right? (B) F: I am afraid I did not quite catch what you were saying. Please repeat it. (C) F: Since you were ill in hospital yesterday, you shouldn't come to work today. (D) F: Although you were late for work yesterday, it doesn't matter because you had a fever yesterday.

Output: B


Input: Consider Input: F: There is a sales event at the shopping center this weekend. Let's go and have a look. ,M: I don't want to go. ,F: What's wrong? Don't you always go check out these things? ,M: Yes, but I've spent all my pocket money this month.
(A) F: Do you not want to go check out these things because you are not interested? (B) F: So you're not going to class because you don't have any money? (C) F: I’m sorry, I don’t understand. Could you say it again? (D) F: I see. You don't have any money because you haven't had a part-time job recently.yaobu


Output: C