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: Today I am interviewing 16-year-old Mike about his feelings on how people can help save the environment. So, Mike. How can we save the environment? ,M: By saving water. ,F: Well, how can we do that? ,M: By not using too much water when we wash dishes, take a bath and when we do other things, like watering the plants outside.
(A) F: I’m sorry, I didn’t understand. Could you repeat a little louder, please? (B) F: Using less water is a good way to save water. You are only 15 years old and you know so much. (C) F: Yes. We can save water by growing more plants. But you said that saving water cannot save the environment. (D) F: That is true. Since you are 15 years old, how do you know that you can save water by recycling rubbish?
Example Output: B

Example Input: F: Everybody thought Jack could defeat his challenger in the game. ,M: I thought so, too. He seldom fails.
(A) F: But fortunately Jack won the game. (B) F: I didn’t hear you. Please could you tell me again? (C) F: But unfortunately Jack lost the game. (D) F: It seems that it was a draw.
Example Output: C

Example Input: M: I'd like this letter to go by EMS. What's the rate? ,F: $7.65 for up to 2 pounds. ,M: Thank you. I hear the EMS is the next day service. Is that true? ,F: Well, it's true within America, but now you are in Beijing. The letter has to go through customs and get registered there. Anyway, it's faster and safer than ordinary mail. ,M: Then how long will it take to get to New York?
(A) F: EMS is next day service everywhere, so your letter can arrive Beijing tomorrow. (B) F: It will take two days to New York, and the rate is $7.65 for up to 3 pounds now. (C) F: It depends on the weather and transportation, but usually within five days. (D) F: I’m sorry, I didn’t understand. Could you repeat a little louder, please?
Example Output:
C