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: Have you seen my cat? He is black with white feet. ,M: He was sitting on that grey fence an hour ago. I think he was trying to catch a bird.
(A) F: Are you sure that's my cat? My cat's main color is black. (B) F: So you mean my cat was sitting on that grey fence two hours ago. Are you sure that's my cat? My cat's main color is black. (C) F: My cat's main color is white, and its feet are black. (D) F: I’m sorry, I didn’t catch that. Would you mind speaking more slowly?

Output: A


Input: Consider Input: M: Lisa, why do you keep a night light on in your room? ,F: I thought you knew that I'm scared of the dark.
(A) M: If you're not afraid of the dark, why keep all the lights on at night? (B) M: I didn’t hear you. Please could you tell me again? (C) M: Why keep a night light in your room at night when you are not afraid of the dark? (D) M: Now I know why you turn on a night light in your room at night.

Output: D


Input: Consider Input: M: If you'd like to go to the concert this Saturday, my sister will give me 2 front row tickets. ,F: Thank you but I promised my brother that I'd watch his son.
(A) M: I am afraid I did not quite catch what you were saying. Please repeat it. (B) M: So you will look after your brother's son this Saturday, right? (C) M: Great, my brother gave me two concert tickets so we will go to the concert on Saturday. (D) M: Since you will look after your brother's son this Saturday, I won't buy the tickets.


Output: B