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: Did the children enjoy the holiday camp or were they all homesick? ,M: Well, I must admit some of the younger kids were a little bit unhappy, because they've never been away on their own before and didn't know some of the other kids. But soon they recovered. By the last day, they didn't want to go home because they were having such a great time.
(A) F: It is too bad that kids didn't get used to the new environment and didn't have a good time in the end. (B) F: Well, it is common that children felt unfamiliar with the new environment at first. (C) F: It is a pity that they are unhappy to attend the trip the whole time. (D) F: I'm sorry, I don't understand. Could you say it again?
Example Output: B

Example Input: F: I'm sorry, but I really must go now as it's getting dark. Thank you very much for the delicious meal. ,M: I'm glad you enjoy it. Thank you for coming. Please drop in when you have time.
(A) F: Thanks for your meal. It was delicious. (B) F: Sure. I am glad that you had a good time in our home. (C) F: I am afraid I did not quite catch what you were saying. Please repeat it. (D) F: Let's go home now. The restaurant is not so well.
Example Output: A

Example Input: F: Thank you. The tea smells good. What is it called? ,M: It's called Tie Guanyin, and is a kind of Wulong tea.
(A) F: I like this cup of green tea. (B) F: This black tea tastes delicious. (C) F: This cup of Oolong tea smells disgusting (D) F: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that?
Example Output:
D