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: 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.

Ex Output:
C


Ex Input:
M: What should we bring to the picnic on Sunday? ,F: Tom and Mary usually take plenty of drinks and fruit, so let's bring some desserts instead.
(A) M: Fine. Let's bring some desserts to the picnic. (B) M: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (C) M: Fine. Let's bring some drinks to the picnic. (D) M: Fine. Let's bring some desserts to the theater.

Ex Output:
A


Ex Input:
F: The coffee pot is empty. No matter how many signs we post, someone keeps drinking the last cup without making a fresh pot. What's the point of rules if nobody follows them?
(A) M: Yes. But why are you bothered by people who keep parking in the wrong place? (B) M: I know. Someone just likes to take the last cup of coffee. (C) M: I didn’t hear you. Please could you tell me again? (D) M: I know. We are all bothered by people making the microwave smelly.

Ex Output:

B