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:2021-11-22, Stock:UNH, The news for the past five days is as follows:
2021-11-15: NEWS1: UnitedHealth Group Included in the Dow Jones Sustainability North America and World Indices for 23rd Consecutive Year.
2021-11-16: NEWS1: UnitedHealth Group Included in the Dow Jones Sustainability North America and World Indices for 23rd Consecutive Year.NEWS2: 10 Best Large-Cap Stocks to Buy According to Columbus Hill Capital Management.
2021-11-17: nan
2021-11-18: nan
2021-11-19: NEWS1: Change Healthcare, UnitedHealth Group and the Department of Justice enter into timing agreement.NEWS2: Why's the Dow Down While the S&P and Nasdaq Hit Record Highs?.NEWS3: Nursing shortage is hampering ‘our ability to deliver care,' Ingenovis Health CEO explains.NEWS4: Harris-Stowe State University snags $2M grant to launch new 'bioinformatics' program.NEWS5: United Health Foundation Partners With Harris-Stowe State University to Create New Bioinformatics Program.

Answer: Decrease