You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Example Input: Sentence1: Thanks, can I also have the phone number and postcode? Sentence2: I'm sorry this happened to you, I really hope that the police are able to help. If there is anything else I can do for you don't hesitate to ask. Sentence3: Yes, the postcode is CB11JG and the phone number is 01223358966 Sentence4: I've been robbed and need the police. Sentence5: Great, thank you for your help. I don't need anything further. Sentence6: Okay, the police station is located at Parkside, Cambridge. Question: Who has spoken the sentence 5? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Reference number is 29IN9CT3 for the acorn guesthouse. Sentence2: Sounds great if it is portuguese. I'll take a reservation for 7 people at 20:00 for the same day. Sentence3: Okay, how about the Acorn Guest House in the north? Sentence4: There is. How does Nandos City Centre sound? Sentence5: Okay, it was my pleasure to assist you! Bye! Sentence6: No, that's all I needed today. Thank you for your help! Goodbye! Sentence7: do you have one the is portuguese food ? Sentence8: I'm looking for information on 4-star rated guesthouses in Cambridge Sentence9: You're all set. Your reference number is 6R5W1RRE and your table will be reserved for 15 minutes. Anything else? Sentence10: I suggest the dojo noodle bar, an asian oriental restaurant, would you like to make a reservation? Sentence11: Sure. Can we spend 5 nights starting on Sunday? I am going to need room for 7 people. Sentence12: I have a number of 4 star guesthouses available, would you like to book one in a particular area? Sentence13: I would also like to eat somewhere cheap in the middle of town. Sentence14: Not really. Could you suggest one with free parking? Question: Who has spoken the sentence 7? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Okay. Where are you looking to go to? Sentence2: I booked a seat for you on TR9839. You can pay the 37.79 GBP due at the station. Reference number X6S3FKEF . Is there anything else today? Sentence3: The first train after that time on Thursday is the TR9839, leaving Cambridge at 15:21, arriving in Leicester at 17:06. Would you like to book a ticket? Sentence4: Did you have a particular day and time in mind? Sentence5: No thanks, I need to find a train leaving from cambridge next. Sentence6: I have 4 attractions in the north. Two of them are swimming pools, one is a park and one is a boating attraction. Do you have a preference? Sentence7: Yes, please book a ticket for one. Sentence8: What is the entrance fee for the boating attraction? Sentence9: I am planning a trip to Cambridge and I would like to know nice places to visit in the North. Sentence10: I will be traveling on Thursday and I need to leave sometime after 15:00. Sentence11: Thank you for using our system today! Sentence12: No, you have helped me tremendously. Thank you! Sentence13: There is no entrance fee listed. I can give you their phone number if you would like? Sentence14: I'm headed to Leicester. Question: Who has spoken the sentence 4? (A) User (B) System
Example Output:
Answer: (A) User