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.

Ex Input:
M: Hi, Maria, what are you up to? ,F: I'm just trying to plan my trip to Southeast Asia. ,M: Where are you planning to go? ,F: Well, I'm going to start by flying to Hong Kong. I have a friend there, who I haven't seen for a long time. Then I'll fly to Vietnam and take a bus down to Ho Chi Minh City. ,M: And then where will you go? ,F: Well, from there, I'll take the boat up River to Seam Reap, and see the famous temples. From there, I'll fly to Bangkok and try to get to the Chatuchak Market. I hear it's really great for shopping.
(A) M: Wow, I always think that taking boat up river to Seam Ream is quite romantic. (B) M: I am afraid I did not quite catch what you were saying. Please repeat it. (C) M: So, you'll go to the airport after you visit the famous ample, then fly to Seam Reap. (D) M: Why you chose boat to Hong Kong? There are many other ways to go there.

Ex Output:
A


Ex Input:
M: Excuse me, is there anyone sitting here? ,F: Oh, no, please. ,M: Ah, thanks. Um, it's a long flight. ,F: Yeah, 11 hours.
(A) M: The is a long journey on bus. (B) M: The train we take lasted eleven hours. (C) M: I’m sorry, I don’t understand. Could you say it again? (D) M: It's really a long flight which has 11 hours.

Ex Output:
D


Ex Input:
F: Did you ever take history 231? ,M: Yeah, last semester. ,F: I took the course this semester. What do you think about the professor? ,M: He's a terrible instructor and demands a lot, but fortunately, he's an easy grader.
(A) F: You are right. He is smart and fun. He never demands much. (B) F: I am afraid I did not quite catch what you were saying. Please repeat it. (C) F: Yes. He is easy-going and never demands much but boring. (D) F: Yes. The biology professor is demanding but a easy grader.

Ex Output:

B