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: Why did you come to school by bike today? Is there anything wrong with your father's car? ,M: No, I just want to do what I can to protect the environment. ,F: That's a wonderful idea. I'll stop taking my father's car, too. ,M: That's great.
(A) F: Although your father's car broke down, we are students and this is what we should do. (B) F: As students, this is what we should do. (C) F: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (D) F: Since our son's car broke down, we should fix it as parents.

Ex Output:
B


Ex Input:
F: Where is Rose, my dear? I wanted to ask her to go to the market to buy some things we need here at home. ,M: Her teacher telephoned just now. She said she asked Rose to stay at school for a performance.
(A) F: Alright. My poor daughter Rose. (B) F: I didn’t hear you. Please could you tell me again? (C) F: I'm really happy to hear our daughter Rose chooses to study at school after class. (D) F: Fine. By the way, my teacher Rose is indeed responsible.

Ex Output:
A


Ex Input:
F: I can't sleep. ,M: What's wrong dear? ,F: I don't know. I just can't sleep. ,M: Is there anything bothering you? ,F: Maybe. I have a test on Friday and I'm worried I won't get a good grade.
(A) M: Well, you must be very tired from preparing the exam of Thursday. (B) M: I’m sorry, I didn’t understand. Could you repeat a little louder, please? (C) M: I'm not surprised that you aren't stressed by the exam and fell asleep easily. (D) M: You must be very stressed out by the exam.

Ex Output:

D