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: I'm sorry, but I really must go now as it's getting dark. Thank you very much for the delicious meal. ,M: I'm glad you enjoy it. Thank you for coming. Please drop in when you have time.
(A) F: Thanks for your meal. It was delicious. (B) F: Sure. I am glad that you had a good time in our home. (C) F: I am afraid I did not quite catch what you were saying. Please repeat it. (D) F: Let's go home now. The restaurant is not so well.

Ex Output:
A


Ex Input:
M: At first, I thought this shirt was yellow, but now it looks green to me. ,F: You were right the first time. It's the blue light in the store that makes everything look different.
(A) M: Right, I like the light blue color of this shirt. (B) M: I guess so. This should be a beautiful authentic yellow shirt. (C) M: I’m sorry, I don’t understand. Could you say it again? (D) M: I know it's because of the red lighting. It's doesn't look yellow at all now.

Ex Output:
B


Ex Input:
M: How can I help you, miss? ,F: Could you break a $20 bill for me? ,M: Sure, how do you want it? ,F: Could I have some fives and the rest in ones? ,M: Well, I have 2 fives, but I don't have enough ones. Are quarters fine with you? ,F: Oh, that's even better. In that case, I won't have to worry about the small change for the bus later. ,M: Here you go.
(A) F: I’m sorry, I don’t understand. Could you say it again? (B) F: Thanks, so you get two fives now. (C) F: Thanks, so I get three fives now. (D) F: Thanks, so I get four fives now.

Ex Output:

A