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.

Example Input: M: Good morning, madam. What can I do for you? ,F: I bought this new radio here half a month ago, then I posted it to my daughter who is studying English in Shanghai Foreign Language University. But a week later she posted it back, saying that it doesn't work. I don't know why. Could you help me check out the radio? ,M: Let me see. Did you check it when you bought it?
(A) F: The radio stopped working one day when I was listening to music. It doesn't work anymore. (B) F: I didn’t hear you. Please could you tell me again? (C) F: I really need to go back to the post office to take back my radio. (D) F: Maybe. Now the radio stops receiving any program.
Example Output: B

Example Input: F: These trousers turned out to be too small for my daughter, so I've brought them back for larger ones. ,M: Certainly, madam. We will take them back if you have your receipt with you.
(A) F: My son said the trousers were too tight for him, so I have to change for bigger ones. (B) F: Here is the receipt. I'll wait here when you change larger trousers. Thanks. (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: You are the best tailor nearby. Please make these trousers larger.
Example Output: B

Example Input: M: Hey, Amy, I've just got 2 tickets to see the opening ceremony. ,F: No wonder you are so excited. Shall we go to a restaurant to celebrate? ,M: What a good idea! Let's go.
(A) F: OK. Let's go and buy the tickets now. (B) F: OK. Let's have a meal first. (C) F: Excuse me, could you repeat the question? (D) F: OK. Let's go and see the performance first and then we will have a meal.
Example Output:
B