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:2019-02-25, Stock:UNH, The news for the past five days is as follows:
2019-02-15: nan
2019-02-19: NEWS1: Here's Why You Should Add Centene (CNC) to Your Portfolio.NEWS2: Here's Why You Should Add Centene (CNC) to Your Portfolio.NEWS3: IWB, UNH, V, PFE: ETF Outflow Alert.NEWS4: IWB, UNH, V, PFE: ETF Outflow Alert.NEWS5: Here's Why You Should Add Centene (CNC) to Your Portfolio.
2019-02-20: NEWS1: UnitedHealth Group (UNH) Stock Sinks As Market Gains: What You Should Know.NEWS2: Only five T. Rowe Price U.S. mutual funds saw positive returns in 2018.NEWS3: Trump Administration Is No Friend to Pharmacy Benefit Managers Like CVS.NEWS4: Has UnitedHealth Group (UNH) Outpaced Other Medical Stocks This Year?.NEWS5: Has UnitedHealth Group (UNH) Outpaced Other Medical Stocks This Year?.NEWS6: Pick These 5 Stocks With Superb Interest Coverage Ratio.NEWS7: Pick These 5 Stocks With Superb Interest Coverage Ratio.NEWS8: Has UnitedHealth Group (UNH) Outpaced Other Medical Stocks This Year?.NEWS9: UnitedHealthcare Helps People Manage Chronic Conditions Through Data-Powered Nerve Center as Navigate4Me Program Expands.NEWS10: Pick These 5 Stocks With Superb Interest Coverage Ratio.NEWS11: What Do Analysts Think About UnitedHealth Group Incorporated’s (NYSE:UNH) Future?.NEWS12: Metro East surgical centers to be sold after closing last fall.NEWS13: Tivity Health, Inc. (TVTY) Q4 2018 Earnings Conference Call Transcript.
2019-02-21: NEWS1: Community Health (CYH) Q4 Loss Wider Than Expected, Down Y/Y.NEWS2: Community Health (CYH) Q4 Loss Wider Than Expected, Down Y/Y.NEWS3: Community Health (CYH) Q4 Loss Wider Than Expected, Down Y/Y.NEWS4: In milestone, UnitedHealth gets HMO license in Minnesota.NEWS5: UnitedHealth Group (UNH) Stock Sinks As Market Gains: What You Should Know.NEWS6: UnitedHealth Group (UNH) Stock Sinks As Market Gains: What You Should Know.
2019-02-22: NEWS1: Mass. judge sides with Amazon-backed startup in Optum lawsuit over employee.NEWS2: UnitedHealth loses bid to block exec from joining Amazon/Berkshire/JPMorgan health care venture.NEWS3: Analyst Favorites With Strong Buyback Activity: Voya Financial Ranks As a Top Pick.NEWS4: Analyst Favorites With Strong Buyback Activity: Voya Financial Ranks As a Top Pick.NEWS5: [$$] UnitedHealth Employee Cleared to Join Health Venture of Amazon, Berkshire, JPMorgan.NEWS6: U.S. judge will not block Amazon-Berkshire-JPMorgan health venture's new hire.NEWS7: U.S. judge will not block Amazon-Berkshire-JPMorgan health venture's new hire.NEWS8: Investor Expectations to Drive Momentum within Verastem, Molson Coors Brewing, SL Green Realty, UnitedHealth Group, TechTarget, and Icahn Enterprises — Discovering Underlying Factors of Influence.

Answer: Decrease