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: F: How may I help you? ,M: I need to buy some clothes for my daughter. I don't know what size to get. Can you help me? ,F: Certainly. How old is she? How tall is she? ,M: She is 9 years old and 4 feet tall. ,F: We have a great selection of clothes for young girls. Pants start at $10 and shirts start at $7.
(A) M: Really? You have a great selection of clothes for young boys and the cheapest shirt is just $10? (B) M: Excuse me, could you repeat the question? (C) M: So, as you mean pants start at $15 and shirts start at $7, the cheapest shirt is just $7? (D) M: Really? The cheapest shirt is just $3? Oh, I need to buy some clothes for my wife.
Example Output: B

Example Input: F: How is there only one more week of summer vacation before we have school again? I haven't even been to the beach yet. Can we go tomorrow? ,M: I'd love to but I promise to Sadie I'd go to the movies with her.
(A) F: OK, Let's meet at the bus stop at eight tomorrow and go to school together. (B) F: I am really sorry, I did not catch that. Would you slow down, please? (C) F: You can shopping in the cinema and then see the movie in the restaurant. (D) F: Which movie are you going to watch?
Example Output: D

Example Input: F: We could have flown to Hangzhou, but I prefer traveling on rail. I like very much to watch the beautiful scenery by the window. ,M: I like traveling by train too. I think it had something to my sense of safety.
(A) F: Although traveling by train is not safe, we can enjoy the scenes outside. (B) F: Excuse me, could you repeat the question? (C) F: You are right. We should fly to Hangzhou. I think it's very safe. (D) F: Yes. Traveling by train is very safe. We should go to Hangzhou by train.
Example Output:
D