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: What a beautiful day! The birds are singing, and the sun is shining in the sky. ,F: Not so loud, I just woke up and I have a headache.
(A) M: I’m sorry, I don’t understand. Could you say it again? (B) M: Come on! It is a beautiful morning. (C) M: Oh, it's raining in the afternoon. You should take an umbrella with you if you go outside. (D) M:  It is not the bedtime, why are you still sleeping in the evening? The sun has gone down.
Example Output: B

Example Input: M: And so tired! I've been up late studying for the math exam for the last 2 nights. ,F: I have, too. But I'm so nervous that I can't fall asleep at night. ,M: Maybe you can drink a glass of milk and take a bath before going to bed.
(A) F: I didn’t hear you. Please could you tell me again? (B) F: Yes, it is a best way to relax. (C) F: How about your study report? (D) F: Since we have taken too mu time on Chinese exam, I think we should have a good rest.
Example Output: B

Example Input: F: Come on, why do you stop your car here? It's still a long way from the town. ,M: I didn't stop the car. The car stopped itself. Let me have a look and find out what the matter is. ,F: Is it out of gas? It was running so well. ,M: Out of gas? Yeah, it's possible. Oh, yes, it is. ,F: But there is no one around and not a building in sight. How can we get some gas? ,M: Don't worry. Just stand by the road. Wave your hands when the next car comes. We are sure to get some gas from others.
(A) F: Excuse me, could you repeat the question? (B) F: No, we shouldn't wait for the next car. There is building there. (C) F: I agree with you. We should take a taxi to the town. (D) F: Are you sure we should wait for the next car?
Example Output:
D