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: Welcome to our program. Today we have invited Fred Watson, an expert on the environment to talk to us.
(A) M: Nice to meet you guys. Let' s talk about environmental problems today. (B) M: Hello, everyone! My name is Bob, today, let' s talk about modern technology. (C) M: I’m sorry, I don’t understand. Could you say it again? (D) M: Thanks, I' glad to be your studio. Today, our topic is about industrial development.

Ex Output:
A


Ex Input:
F: I'm happy to hear about your friend's wedding, sir. For your jacket, would you like a more traditional 3 button or a modern 2 button? ,M: Let's go with the 2 button. I'm not as slim as I used to be, you know.
(A) F: OK. You are going to attend an anniversary party, aren't you? (B) F: Sure. You will look great in this jacket at this business event. (C) F: I am really sorry, I did not catch that. Would you slow down, please? (D) F: Fine. I am sure you will look good at the wedding.

Ex Output:
D


Ex Input:
F: Jerry, how many times have I told you that you can't watch TV before finishing your homework. Turn it off. ,M: But Grandma agreed. ,F: I don't care what my mom said to you. You just do what I said, now!
(A) M: I’m sorry, I didn’t understand. Could you repeat a little louder, please? (B) M: Sorry professor. I won't make the same mistake in my homework again. (C) M: Sorry mum. I will help you to set the table for dinner now, and then I may come back to watch TV. (D) M: Sorry grandma. I will listen to your words not my mum's next time.

Ex Output:

A