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: Was that telephone ringing? ,F: I didn't hear anything. ,M: I thought I heard it ring two or three times. ,F: Sometimes when the windows are open, you can hear our neighbors phone. ,M: Well, I'm expecting an important phone call and I don't want to miss it. ,F: Is it anything I should know about? ,M: Not really. It has something to do with work and doesn't really affect us here at home. ,F: Well, why don't you go ahead and do what you want to do outside? I'll call you if the phone rings. ,M: Thanks, I think I will. I've been waiting so long now. I'm getting nervous. I need to breathe in some fresh air.
(A) F: The phone you are waiting for will not come even you're very nervous, so just relax. (B) F: Don't be nervous about neighbor's phone, we won't hear it even with open windows. (C) F: I’m sorry, I don’t understand. Could you say it again? (D) F: It must be the phone you're waiting. We can't hear our neighbor's phone at any case.
Example Output: A

Example Input: F: Can I help you find something, sir? ,M: Yes, I need a strong lock for my bike. I am a photographer and I often have to leave my bike for long periods of time while I go take pictures. I'm hoping to spend less than $50 if possible.
(A) F: Why do you need a bike? (B) F: I’m sorry, I didn’t understand. Could you repeat a little louder, please? (C) F: You mean your lock is broken. It needs repairing, right? (D) F: What kind of lock do you like?
Example Output: D

Example Input: M: Tony broke a vase in the classroom. ,F: Oh my gosh. I believe the usual thing happened again. The teacher asked him to stay after school and buy a new one. ,M: No, she just asked him to dry the floor.
(A) F: I have guessed that the teacher asked Tony to stay after school, although he didn't break the vase. (B) F: Just a minute! I do not quite follow what you are saying, would you mind repeating that? (C) F: You mean, because the vase didn't break, the teacher only let Tony stay after school to dry the floor? (D) F: Did the teacher just leave Tony to dry the floor after school?
Example Output:
D