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: May I speak to Mr Brown please? ,M: Oh, sorry. He isn't in at the moment. ,F: When will he be back then? ,M: Sorry, I don't know. Can I take a message? ,F: Certainly.
(A) M: I’m sorry, I didn’t understand. Could you repeat a little louder, please? (B) M: I'm so glad to talk to you through phone, Mr Brown. (C) M: All right. Please tell him that I called and I want to invite him for a party. (D) M: I'm so happy to meet you in the meeting room, Mr Brown.

Ex Output:
C


Ex Input:
F: That looks nice. I'll have a cheeseburger and fries. ,M: Anything to drink? ,F: A chocolate milkshake. ,M: That'll be $2.75.
(A) F: Here it is, and you need to give me $2.65 change. (B) F: OK, here's $2.75 for the food and drink. (C) F: $2.75 for a milkshake? That's expensive. (D) F: I didn’t hear you. Please could you tell me again?

Ex Output:
B


Ex Input:
F: Mark, I remember you saying that small spaces made you feel uncomfortable. Should we take the stairs instead? ,M: No, I should be OK. I live on the fourteenth floor in my own building. So I'm used to it. I'll just close my eyes until it's done.
(A) F: Ok, It's a good thing that this elevator doesn't feel very wobbly. (B) F: Ok, this elevator is much faster than the one you live in on the twelfth floor. (C) F: I didn’t hear you. Please could you tell me again? (D) F: Okay, but the fourteenth floor we are standing on is much higher than the twelfth floor you live on.

Ex Output:

A