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: Is there a city where it's always warm? ,F: Yes, there are many cities where it's almost always warm. San Diego for example. ,M: Are there any other cities where it's always hot? ,F: Yes, there are quite a few. Most of the cities in the southern part of the United States are hot all year.
(A) M: I see. Most cities in the western part of China are always hot. (B) M: I know that cities in the southern part of China is always hot. (C) M: Excuse me, could you repeat the question? (D) M: It seems that most cities in the southern part are hot all year around.

Output: D


Input: Consider Input: F: Congratulations on winning the speech contest, Peter! ,M: Thank you. ,F: Could you tell me some important factors in delivering a successful speech? ,M: Well, basically 4 points. Pronunciation, intonation, a well written essay and proper body language.
(A) F: I didn’t hear you. Please could you tell me again? (B) F: So, you failed the speech contest because you believe pronunciation and intonation are the important factors in delivering a successful speech? (C) F: Really? Basically 2 point? And proper body language is the important factor in delivering a successful speech? (D) F: So, all of the above are the important factors in delivering a successful speech, except the  pronunciation and intonation.

Output: A


Input: Consider Input: F: If I were 10 years younger, I would have got the job. ,M: Right. They think young girls can do the job better.
(A) F: You are right, I'm old and mature enough to do this job. (B) F: I know. I'm not as young as I used to be any more. (C) F: I’m sorry, I didn’t understand. Could you repeat a little louder, please? (D) F: I'm no longer young as I used to be, so I think I can do this job better.


Output: B