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: Hi, Mary, you are in Boston, too. I remember you are admitted to Washington University. And are you meeting someone at the airport? ,F: Glad to meet you here, Bob. I am meeting my parents. You are paying a visit to your grandparents?
(A) M: Yes. Have your parents' flight arrived? I can give you a lift later. (B) M: I see that your parents' flight has been delayed, darling. Let's wait. (C) M: Correct. Anyway, it's very surprising to see you at the train station. (D) M: I didn’t hear you. Please could you tell me again?

Output: A


Input: Consider Input: F: Ladies and gentlemen, we are flying to San Francisco. ,M: Excuse me, Miss. ,F: Yes, sir. What's wrong? ,M: It's terrible. ,F: Are you feeling airsick? ,M: No. I've just realized I don't have my travel bag with me. ,F: Don't worry sir. Can you tell me what your bag is like? ,M: A small blue one made of leather with my name and address on it, a Brown basketball toy tide to the belt and my black wallet inside it. ,F: Can you remember where you last saw it? ,M: Let me see. Oh I must have left it by your airline counter at the airport when I registered my luggage.
(A) F: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (B) F: Don't worry sir. I'll contact the staff from the hotel to get your bag back. (C) F: So you didn't leave your name or address on the bag, did you? (D) F: You left your bag at the airport? Don't worry. I'll contact the workers there.

Output: D


Input: Consider Input: M: Long time no see. Where did you go? ,F: I was on vacation. I went to Beijing and stayed at my cousin's place. ,M: Sounds great.
(A) F: I went to Nanjing and visited my cousin. (B) F: I went to Nanjing on holiday. (C) F: I went to Beijing on holiday. (D) F: I’m sorry, I didn’t understand. Could you repeat a little louder, please?


Output: C