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: Good afternoon, sir. Can I help you? ,M: Yes, we need a room for the night. Have you got any rooms available? ,F: Yes. What do you like a single room or a double room? ,M: A double room. ,F: How many nights would you like to stay? ,M: We're only staying overnight. We'll check out tomorrow morning.How much is it? ,F: It's $68 per night.
(A) M: As I'll stay for two nights, it's $136 in total. (B) M: Then I need to pay $68 for the single room. (C) M: Just a minute! I do not quite follow what you are saying, would you mind repeating that? (D) M: So, $204 a night for my single room. Alright.

Ex Output:
C


Ex Input:
M: Mother, can you buy me a copy of this month's sunrise magazine? There's an article in it about how to care for fish. ,F: Sure. I'll get one for you this afternoon when I go to get a new teapot.
(A) M: Thanks. I just need a fashion magazine. (B) M: Thanks. I just need a magazine. (C) M: I am afraid I did not quite catch what you were saying. Please repeat it. (D) M: Could you please bring me a teapot?

Ex Output:
B


Ex Input:
F: Excuse me. I'd like to change this blue jacket I bought last week, for that black one. ,M: The blue one is $19 and the black, $50.
(A) F: I will pay you $31 to change the black one, right? (B) F: I want that black coat, this is $31. (C) F: I am afraid I did not quite catch what you were saying. Please repeat it. (D) F: The black jacket is $69 more expensive than the blue one.

Ex Output:

A