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: F: Can I help you find something, sir? ,M: Yes, I need a strong lock for my bike. I am a photographer and I often have to leave my bike for long periods of time while I go take pictures. I'm hoping to spend less than $50 if possible.
(A) F: Why do you need a bike? (B) F: I’m sorry, I didn’t understand. Could you repeat a little louder, please? (C) F: You mean your lock is broken. It needs repairing, right? (D) F: What kind of lock do you like?

Output: D


Input: Consider Input: M: Shirly, I'm working on our class diary for next week. Would you please give me the information? ,F: Sure. First is the deadline for after class activity application. The deadline is next Monday, June fourteenth. ,M: Monday, June fourteenth. ,F: Yes, then on Wednesday, that's the sixteenth, all classmates have to hand in three student photos. ,M: Three student photos. ,F: OK. Next is the basketball club meeting. It's on the seventeenth. ,M: The basketball club meeting on the seventeenth, and where will they meet? ,F: At the stadium. ,M: And at what time? ,F: From 12:45 to 1:30 PM. ,M: Right. ,F: Then the last thing is about filling in a form with up-to-date personal data. Our class needs to go to the computer room during the morning break on the eighteenth. ,M: OK. The morning break on the eighteenth. ,F: Ah, wait a minute. I made a mistake. It should be during the lunch break.
(A) M: It's OK. You just made a mistake about the place. (B) M: It's fine. You are wrong about the event on the eighteenth. (C) M: I’m sorry, I don’t understand. Could you say it again? (D) M: It's fine. You are just wrong about the time of filling in the form.

Output: D


Input: Consider Input: F: I'm planning to go to Canada on vacation. ,M: What places are you going to visit? ,F: First, I'll spend a few days in Vancouver. Then I'll take a train through the Rocky Mountains. ,M: Oh, you're riding through the Rocky Mountains. That's really exciting. ,F: Then I'll fly to Toronto and take a bus to Niagara Falls. I will take a boat under that huge waterfall. ,M: Wow, that's wonderful. You're so lucky! ,F: Well, I hope I don't get seasick. I'll finish my trip in Nova Scotia. I'd like to bike around some small fishing villages. ,M: Have a great time and take lots of pictures!
(A) F: Thank you. I really had a wonderful experience yesterday. (B) F: I am reading an introduction to Canada, but I will not go to Canada. (C) F: I’m sorry, I don’t understand. Could you say it again? (D) F: Thanks a lot. My travel plan is perfect. I will have a good time.


Output: D