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.

Input: Consider Input: F: Welcome to our program. Today we have invited Fred Watson, an expert on the environment to talk to us.
(A) M: Nice to meet you guys. Let' s talk about environmental problems today. (B) M: Hello, everyone! My name is Bob, today, let' s talk about modern technology. (C) M: I’m sorry, I don’t understand. Could you say it again? (D) M: Thanks, I' glad to be your studio. Today, our topic is about industrial development.

Output: A


Input: Consider Input: M: Hi, there. I think I'm coming down with something. I need some medicine to get me through the next few days. ,F: Wow, you look terrible. What's going on? ,M: Well, my throat hurts. My nose has been running and I have a bad cough. It could just be cold, but I don't know for sure. ,F: You should take some cold medicine and get some rest. You don't look well. ,M: I have a very important job and I can't miss any work. So, give me something strong.
(A) F: I am afraid I did not quite catch what you were saying. Please repeat it. (B) F: Good to know that you'll take a sick leave as you look ill. (C) F: Are you sure you won't rest at home? You really look sick. (D) F: Your throat is perfectly fine? But you sounds unhealthy.

Output: C


Input: Consider Input: F: Jeff, what's your favorite Mexican holiday? ,M: Definitely the Day of the Dead. ,F: What is that? It sounds a little scary. ,M: It's not really scary for us Mexicans. Actually, that day we celebrate, well, not celebrate, but remember our family members who are already dead. ,F: OK. How do you remember them? ,M: We put a big table decorated with flowers, bread, coffee or whatever the person that is dead used to like. And we think that on that day, that person is going to come back from the dead. ,F: I see. And when do you have the holiday? ,M: It's on November the first, and the second, too.
(A) F: I’m sorry, I didn’t understand. Could you repeat a little louder, please? (B) F: So the holiday lasts for two days in early November. I want to have a see myself. (C) F: Then you have two days in July to talk with those people whom you miss a lot. (D) F: This is a quite long holiday. There are three days in August for you to celebrate it.


Output: B