Based on the news about the stock in the past five trading days, please predict the rise or fall of the stock in the next trading day. If the stock is predicted to rise in the next trading day, please output [Rise], if the stock is predicted to fall in the next trading day, please output [Decrease].

Date:2018-06-18, Stock:BRK-A, The news for the past five days is as follows:
2018-06-11: nan
2018-06-12: NEWS1: Ackman Is Back; Time To Back Ackman Via Pershing Square Holdings.NEWS2: Ackman Is Back; Time To Back Ackman Via Pershing Square Holdings.NEWS3: Ackman's Back; Time To Back Ackman Via Pershing Square Holdings.NEWS4: Ackman's Back; Time To Back Ackman Via Pershing Square Holdings.
2018-06-13: NEWS1: Uber Drives Towards Developing Markets with New Uber Lite App.NEWS2: Uber Drives Towards Developing Markets with New Uber Lite App.NEWS3: Interview With Bestselling Author Larry Cunningham On What It Would Take To Create Another Berkshire Hathaway.NEWS4: Interview With Bestselling Author Larry Cunningham On What It Would Take To Create Another Berkshire Hathaway.
2018-06-14: nan
2018-06-15: nan

Answer: Decrease