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: How can you be shouting at your grandpa? You can't be so rude! ,M: No, I don't want to be rude to him, but I had to shout so that he could hear me. My grandpa has something wrong with his ears. He doesn't hear well. ,F: I'm sorry. I misunderstood you. Your grandpa looks kind. ,M: Yes, he is kind to everybody in our small town. So we all respect him. ,F: He looks quite old now. He must be in his seventies, right? ,M: Yes, he is 75 years old this year. ,F: Though he looks so old, he is still in good health. ,M: Yes, of course, he gets up early every morning and does some exercise in our garden. That's why he is still in good health. ,F: How's your granny? Is she still in good health like your grandfather? ,M: She was 5 years younger than my grandfather, but she died of heart disease 3 years ago.
(A) F: Sorry to know your grandmother passed away this year at the age of 75. (B) F: Excuse me, could you repeat the question? (C) F: Oh, I'm sorry to hear that your grandmother died in a quite young age of 67. (D) F: I feel sorry. As she left at the age of 65 last year, you must miss her a lot.

Ex Output:
C


Ex 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?

Ex Output:
D


Ex Input:
F: Hello, Bill. Nice to see you again. I heard you went into hospital for a few days. I hope everything is OK. ,M: Yes, fine. I was really nervous just before I had the operation, but strangely enough, the operation was over when I woke up. ,F: It must have really hurt afterward. ,M: Well, the nurse gave me plenty of pain killers, but it did feel uncomfortable. I wasn't permitted to eat anything for 48 hours. That was the worst thing. ,F: I bet you are ready for a nice big steak when you got out of hospital. ,M: I certainly was. However, the doctor gave me a list of food I couldn't eat for another 72 hours. And steak was on the list. ,F: Did they take good care of you in the hospital? ,M: Oh, yes. The nurses were very kind. Though they were strict about what I could drink, in the end, I just drank water and nothing else. How I wish to drink some beer now!
(A) F: Well, You'd better not drink beer until you're fully recovered. (B) F: I am afraid I did not quite catch what you were saying. Please repeat it. (C) F: Okay, let's leave the hospital, don't worry, you just got cold last night. (D) F: Okay, let's find a restaurant and eat some steaks for the celebration of your promotion.

Ex Output:

A