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:
M: Can I have my bill, please? ,F: Yes, one moment, please. ,M: Do you take credit cards? ,F: Sorry, we don't accept checks, either. You have to pay in cash.
(A) M: OK. I'll pay by credit card. (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: Fine. I will pay by cash. (D) M: You don't accept cash? How about credit card?

Ex Output:
C


Ex Input:
M: I was awaken up in the middle of the night. I felt the building shaking. ,F: What time did it happen? ,M: I don't know. It was dark everywhere. I couldn't see the clock. Luckily, I lived on the second floor. I hurried to run out. With the Moonlight I found it was 2:45.
(A) F: So, you could not see your watch because the electricity was cut off. But with the moonlight you found it was 3:45. (B) F: So, you mean you could not see your watch because the electricity was cut off. (C) F: I’m sorry, I didn’t catch that. Would you mind speaking more slowly? (D) F: So, you mean you could not see your watch because you hurried to flee for your life and you lived on the fifth floor?

Ex Output:
B


Ex Input:
M: Hi, Jane. Haven't seen you for a long time, where have you been? ,F: I studied in Singapore for 2 years and then came back to work here in Toronto. Next month I will be sent to a branch in Los Angelus. ,M: You are really lucky traveling around.
(A) F: Since I will leave Singapore to study soon, let's have a good time recently. (B) F: Yes, I'm looking forward to studying in Canada. (C) F: You're right, but I can't bear to leave Canada to work in a different place. (D) F: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that?

Ex Output:

C