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: Hi Miya, how are you? ,F: I'm very well, thanks. But I'm crazy busy these days. How are you? ,M: Fine, thanks. Why are you so busy? ,F: I have a Chinese test next week.
(A) M: So you are busy with your Chinese study for the commming exam this Friday. (B) M: Which level of the Chinese test you will have next week? (C) M: I didn't hear you. Please could you tell me again? (D) M: Why do you want to go to the cafe? You are so free these days.
Example Output: B

Example 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.
(A) F: I'm sorry, I don't understand. Could you say it again? (B) F: Wow, it's amazing your grandfather does cooking every morning instead of doing any exercise. (C) F: Since your grandfather does exercise every morning, why is he in such a poor physical condition? (D) F: Sounds reasonable. I will tell my grandma to do some exercise every morning, like your grandpa.
Example Output: D

Example Input: M: Hey, Susie. Can I borrow your car tonight? ,F: No. The last time you borrowed it, you returned it with the gas tank empty. ,M: Did I? I'm sorry, baby. I promise to fill the tank this time. ,F: What do you need it for? ,M: I want to take my mom out to dinner. ,F: And I'm not invited? ,M: You can come if you want. I thought you'd probably have plans with your friends.
(A) F: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (B) F: I'm free tonight, dad. May I ask why do you want me to go out with my friends? (C) F: Seems you are embarrassed about me. You don't want your secretary to appear. (D) F: Actually, yeah, I was planning something else. But the dinner is more important, professor.
Example Output:
A