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: I heard you went to Las Vegas. What did you do? ,M: Well, we went shopping a lot. We went and visited the Hoover Dam. ,F: That's a lot of water. Did you go swimming? ,M: No, it's not warm enough for that.
(A) F: Why didn't you go shopping in Las Vegas? (B) F: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (C) F: You failed to swim in Hoover Dam in Las Vegas but you swam in somewhere else there, right? (D) F: Why didn't you visit the Hoover Dam in Las Vegas?

Ex Output:
B

Ex Input:
F: Hey, I've just notice something. The player that one right there in the middle of the field has only one hand. ,M: It took you long enough to notice? Yeah, he's one of the top players in the league.
(A) F: I'm afraid that we are unable to beat him during this game. (B) F: Just enjoy the play. Oh my god! The player that one right there in the middle of the field has both hands but only one leg. (C) F: Wow, I'm glad that we are watching this match. (D) F: Just a minute! I do not quite follow what you are saying, would you mind repeating that?

Ex Output:
C

Ex Input:
F: Terrible. How about peoples lives? ,M: Fortunately no person died. ,F: That's great. It seems that typhoon is not as bad as earthquake. ,M: Yeah, earthquake is one of the worst natural disasters in the world. ,F: That's why many people died in the earthquake. ,M: Well, China is located on the Eurasia Plate, where earthquakes happen frequently due to the earths plates knocking against each other. ,F: Oh, China has been hit by several big earthquakes during its long history.
(A) M: China is isolated from any plate. It's the long history that witnesses so many earthquakes. (B) M: I'm sorry, I didn't catch that. Would you mind speaking more slowly? (C) M: Yes. As I said, China is on the Eurasia plate, which is very vast and moving rather actively. (D) M: Though on the inactive Asiamerica plate, China is so big that earthquakes often happen here.

Ex Output:
C