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:
F: Your school bag is really cool. Where did you get it? ,M: My aunt sent it from Australia for Christmas.
(A) F: I see, your favorite holiday is Christmas, your uncle bought you a bag for Christmas, right? (B) F: Your aunt sent the school bag to you from Australia. It's so cool! (C) F: It's nice of your aunt to send you a bag from England. (D) F: Just a minute! I do not quite follow what you are saying, would you mind repeating that?

Ex Output:
B


Ex Input:
F: Hello, American Medical Association. Can I help you? ,M: I want to find a doctor. ,F: What kind of doctor are you looking for? A general doctor or a specialist? ,M: What is the difference between a general doctor and a specialist? ,F: A general doctor treats a variety of illnesses and will treat your whole family. A specialist concentrates in one area, like the heart or the skin. ,M: Then I would like to find a general doctor. ,F: In that case, you may want to call Doctor Green at 6663579 or Doctor Smith at 6668520.
(A) M: Thank you for telling me those treatments. I'll call Doctor Brown later. (B) M: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (C) M: Thank you for helping me make the appointment with the lawyer. (D) M: Thank you for all your information. That helped a lot.

Ex Output:
D


Ex Input:
M: Congratulations, Betty. ,F: Thank you. What about Peter? ,M: Oh, he dropped the stick. ,F: Bad luck. Do you know who won the high jump? ,M: My classmate Joe. ,F: Your class do very well at this sports meeting. By the way, who was first in the men's 100 meter race? ,M: It definitely belongs to Bob.
(A) F: Wow! John not only won the high jump, but also the men's 100-meter race! (B) F: I am really sorry, I did not catch that. Would you slow down, please? (C) F: Although Bob dropped the stick, he won the men's 100-meter race. (D) F: Bob won the men's 100-meter race? That's great!

Ex Output:

D