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.

Input: Consider Input: F: Tom, the cases are too heavy. I think we should take a taxi to the station. ,M: Not at this hour. Look at the traffic. It's moving very slowly. We can get there just as quickly on foot. ,F: Well, I can't carry this case any farther. ,M: Alright, let me take it then. The cases aren't that heavy. ,F: Don't be silly. They're heavier than you thought, especially when you carry them for some time. ,M: Hmm, perhaps it isn't a bad idea. ,F: What is not a bad idea? What do you mean? ,M: Taxi, taxi!
(A) F: As you refused taxi and the case isn't heavy, let's walk. (B) F: Though the case isn't heavy at all, it's good to take taxi. (C) F: Thanks god, you finally agree to call a taxi. Let's wait here. (D) F: I’m sorry, I don’t understand. Could you say it again?

Output: C


Input: Consider Input: M: Talking about the future. I think there will be huge changes in the way people use cars. Laws will be made about what kind of car you can own and when you can use it. ,F: Maybe they'll just be too many of them on the roads. The air will be so seriously polluted that nobody will be able to breathe normally. ,M: Exactly. People will have to rely on trains.
(A) F: I am afraid I did not quite catch what you were saying. Please repeat it. (B) F: I see. You believe that trains will change a lot while cars remain the same, so people would choose trains more often. (C) F: Why do you think that cars will be the most common kind of transportation many years later? (D) F: Oh, why you think people will rely on trains in the future?

Output: D


Input: Consider Input: M: Excuse me, I wonder if my dictionary has arrived? ,F: Sorry sir. We haven't received any special orders this week. I'm afraid you'll have to rebook it.
(A) M: You will book the dictionary for me? Thanks. (B) M: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (C) M: You haven't received my order? Oh no. (D) M: My book which I ordered has arrived? Thanks.


Output: C