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: One ticket to Chicago, please. ,M: Yeah, Ok, that's $24.00. ,F: Does this one have a dining car? ,M: Yeah, there is a dining car and a snack bar. Here's your change. ,F: Thanks.
(A) M: Why isn't there a dining car? We are on the train, aren't we? (B) M: So although we are in the dinning hall, there is no snack bar, right? (C) M: Why isn't there a dinning hall in the ticket office? (D) M: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that?

Ex Output:
D


Ex Input:
F: Wow, I didn't know you were such a great cook. These fake potatoes are to die for. ,M: I've been taking cooking lessons, and you haven't seen anything yet. You're going to love the main course.
(A) F: I'm not surprised that the baked potatoes are your best dish. (B) F: Just a minute! I do not quite follow what you are saying, would you mind repeating that? (C) F: I can see that. I'm sure the next dish is going to be really special. (D) F: I'm not surprised that you will be making something even better next time, those fake potatoes are awful.

Ex Output:
C


Ex Input:
F: Have you seen my coat? I am going to have to go down to the shop for more bread. ,M: Why? ,F: I'm not sure what happened. I made some sandwiches earlier and left them on the table when I went to answer the phone. But someone must have taken them, because they're gone. ,M: Oh, it must have been dad. I'm sure he was in the kitchen earlier. ,F: No, he went off to his tennis match before I finished making them, so he couldn't have done it. Anyway, he couldn't carry a plate of sandwiches as well as his tennis stuff, so I'm sure it wasn't him. ,M: Well, it wasn't me. But look, are these your sandwiches here, on the bottom shelf of the fridge? ,F: Are they there? Oh, my goodness, I must have put them there when the phone rang. Oh dear, I really must be losing my mind. ,M: Well, you needn't go to the shop now. Let's have lunch.
(A) F: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (B) F: Come on, let's have lunch now. (C) F: No, I'll go shopping first. I need to buy some sandwich. (D) F: Sure. Let's have lunch. It's a pity that I can't find the sandwiches I just made.

Ex Output:

B