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: What did you buy at the market? ,F: I bought some special local products. ,M: You seem to have bought the whole market. ,F: Yes. I really wanted to do so. I love those handicrafts, especially the papercuts. ,M: Papercuts are all handmade. Let me see the papercuts you bought. Oh they're all animals. ,F: Aren't animals. The main content of Chinese paper cuts. ,M: Alright animals are the most common theme in paper cuts, but there are other themes. ,F: I will buy some tomorrow. ,M: Why do you want to buy so many?
(A) F: Because I want to buy some paper-cuts tomorrow and give them to my friends. (B) F: I'm sorry, I don't understand. Could you say it again? (C) F: I want to learn to make paper-cuts tomorrow and give them to my friends. (D) F: I didn't buy anything from the market. Tomorrow I will send paper-cuts to my friends.
Example Output: A

Example Input: F: Good morning, young man. What's your name, please? ,M: My name is Zhang Ming. I'm 12 years old now. Can you introduce your doctors? ,F: We doctors in this hospital fly to different poor places. People with eye problems can come to us. We give medicine to the poor or do operations on them free. ,M: I started to have problems with my eyes when I was 7. Now I can't see things clearly. Can you help me? ,F: Yes, of course. We'll try our best. ,M: My parents don't have enough money for the medicine or the operation. ,F: Don't worry. We get donations from all over the world. You don't have to pay.
(A) M: Really? If I don't need to pay much, I'm willing to receive treatment right now. (B) M: I'm afraid that I couldn't pay a lot of money to treat my sister's eye problem. (C) M: I didn't hear you. Please could you tell me again? (D) M: My sister will be very happy if she know she can cure her eye for free.
Example Output: C

Example Input: M: I'd like to go to the Bank of Switzerland. How do I get there? ,F: It's quite a long way to walk there. I'd suggest you take a taxi or the subway. ,M: Where can I take the subway? ,F: You can get it at City Hall station, turn left when you leave the hotel. Go straight ahead. You'll see City Hall on the right. Go down one of the entrances to City Hall station, then get off Chong Road station. ,M: Chong Road station? ,F: That's correct. When you leave the station, walk east, you'll see a small park on your left. Keep on walking for about 2 minutes, you'll see a post office. The bank is just behind it. ,M: That sounds like an adventure. Maybe a taxi is a better choice.
(A) F: Are you sure you are going there on foot? (B) F: Yes, taxi is a better choice for sure. (C) F: Yes, you can go there by subway, but I think that taxi is a better choice. (D) F: I didn't hear you. Please could you tell me again?
Example Output:
B