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: M: Welcome back to your student union radio station. I'm with Catherine, who just successfully climbed the Great Mountain, Mont Blanc. Actually, she once did. The same climb in 2007. Catherine, was it easier the second time around? ,F: In many ways. They were totally different experiences. The first time I went as part of an organized group. We took 4 days to reach the top. This year, I decided to go alone with just one overnight stop, actually you're never really alone. It's all been crowded up there. The first climb, was quite difficult is the weather was very changeable, and we found ourselves climbing in very cold windy conditions. The weather this time was wonderful. Plus. I spent a few days before in chamonix and got myself more used to the height. If it's certainly made it easier, you can also achieve the same thing by climbing some of the smaller mountains first.
(A) M: It's a good idea to spend a few days in Chamonix, which makes climbing easier. (B) M: You are so great! Betty, I should learn to you and make a detailed plan. (C) M: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (D) M: You climb smaller mountains for training before your third time to climb Everest.

Output: A


Input: Consider Input: F: Was yesterday's meeting held in room 305? ,M: 305 was occupied and the computer in 306 was out of order, so we moved to 307.
(A) F: Since the computer in room 305 was out of order, why was the meeting held in room 305? (B) F: Since room 306 was occupied, why was the meeting still held in room 306? (C) F: Because room 306 is occupied, the meeting was held in room 307, right? (D) F: I’m sorry, I didn’t understand. Could you repeat a little louder, please?

Output: D


Input: Consider Input: M: Hello. This is the China Telephone Company. What can I do for you? ,F: Is this the Complaints Department? ,M: Yes, it is. ,F: I want to complain about the bill I received this month. I don't think I've made that many phone calls. Have their rates gone up? There must be a mistake in your billing. ,M: Alright Madam, tell me your phone number and I'll check it for you. ,F: My number is 63513516. ,M: Thank you. Please hold on for a moment. ,F: Alright. ,M: Hello? ,F: Yes, I'm still here. ,M: Well, there doesn't seem to be any problems with your account. The billing is accurate. You must have overlooked the international call you made to Europe. ,F: Let me see. Right. I'm sorry, it's my mistake. But it is still very expensive. ,M: Well, why don't you apply for the international dial service? It's free of charge. ,F: Can I do that? ,M: Sure. You can. The rates are cheaper as you do without assistance from the operator. ,F: I see. Well, thank you very much and I'm sorry for bothering you. ,M: It's no bother at all. That's what we're here for. Thanks for calling.
(A) F: I shouldn't have turned to the assistant. I am really sorry. (B) F: I made a wrong complaint. I am really sorry. It's my fault. (C) F: I mixed up the telephone numbers so I bother you. Sorry. (D) F: I’m sorry, I didn’t understand. Could you repeat a little louder, please?


Output: B