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.
(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.

Ex Output:
D


Ex Input:
M: Hi, would you like some help? ,F: Well, I'm looking for something I saw at a friend's house a few days ago. It's a Chinese style wooden chair. ,M: You're in the right store. In the past, they were $65 each. But we have a special price now. And the new ones are $5 cheaper.
(A) F: $60 for 2 chairs? That's cheap. (B) F: I am afraid I did not quite catch what you were saying. Please repeat it. (C) F: So I need to pay $65 for a chair, right? (D) F: So I need to pay $70 for a chair, right?

Ex Output:
B


Ex Input:
M: How was the airplane ride yesterday? ,F: It couldn't be worse. It was a 12-hour flight and the couple sitting next to me kept talking all the time.
(A) M: Sure. Your airplane ride today was exciting. (B) M: It seems that your airplane ride today was terrible. (C) M: I am glad that you had a relaxing 10-hour flight. (D) M: I am afraid I did not quite catch what you were saying. Please repeat it.

Ex Output:

D