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: What's your favorite subject, Lily? ,F: I used to like math, but now I feel it's so difficult for me. And physics, too. I fall in love with English.
(A) M: So English is your favorite subject, right? (B) M: Why didn't you like English now? (C) M: I’m sorry, I didn’t understand. Could you repeat a little louder, please? (D) M: So Math is your favorite subject, right?

Output: A


Input: Consider Input: F: Here we go. Now, Terry, you were saying that you went from Vancouver to San Diego. How many days did that take? ,M: Um, the total trip took 42 days but that included one day on the bus up and then one day on the bus back.
(A) F: I am afraid I did not quite catch what you were saying. Please repeat it. (B) F: It just took you 42 days from New York to San Diego? That's amazing. (C) F: It is worthy for you to travel in China for 40 days, it a wonderful country. (D) F: The 36 days stay in Japan must be interesting, right? Tell me more about that.

Output: A


Input: Consider Input: M: I heard that you went to Qingqing Grassland. Can you tell me something about the journey? ,F: Yes, we had a wonderful time there. ,M: What did you do at Qingqing Grassland? ,F: We had a lot of fun. We rode horses, played volleyball and football, and had evening parties, watched the sunrise, climbed the hills and so on. Look, here are some photos taken there. You can see how we were. ,M: I can see. What about the weather?
(A) F: The weather there is fine. I watched the beautiful sunset there. (B) F: The weather there is fine. I played basketball on Qingqing Grassland. (C) F: I didn’t hear you. Please could you tell me again? (D) F: The weather there is fine. I rode horses and it was the most interesting.


Output: D