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:2019-12-19, Stock:UNH, The news for the past five days is as follows:
2019-12-12: NEWS1: SHAREHOLDER ALERT: WeissLaw LLP Investigates Diplomat Pharmacy, Inc..NEWS2: Dow Jones Today Jumps Ahead Of White House China Trade Meeting; Starbucks Rumbles, These 4 Blue Chips In Buy Range.NEWS3: UnitedHealthcare hones in on digital health for its first Techstars class of startups.
2019-12-13: NEWS1: UnitedHealth, Apple Inc. share gains lead Dow's nearly 100-point climb.
2019-12-16: NEWS1: US Indexes Close at New Highs Monday.NEWS2: Goldman Sachs bullish on the healthcare sector.NEWS3: Beshear rescinds Bevin Medicaid reforms — leaves major question unanswered.NEWS4: Dow Jones Today: Lots of Headlines to Digest.NEWS5: Stocks notch fresh records after preliminary U.S.-China trade deal lifts optimism.NEWS6: Goldman Sachs Adds Amgen, UnitedHealth, Dentsply Sirona To Conviction List.NEWS7: Stock Market Rallies Again; Dow Jones Hits New High, Led By UnitedHealth, Goldman, Apple.NEWS8: UnitedHealth, Humana stocks surge toward records after report health insurance tax may be eliminated.NEWS9: 3 Health-Care Stocks Goldman Sachs Says to Buy.NEWS10: Dow Jones Today Rallies, Goldman Up, Boeing Down; Amarin Scores A Breakout.NEWS11: Amgen, UnitedHealth and Dentsply Higher After Goldman Adds Them to Conviction List.
2019-12-17: NEWS1: UnitedHealth Group (UNH) Stock Sinks As Market Gains: What You Should Know.NEWS2: Markets Extend Rally, Led by Tech Sector.
2019-12-18: NEWS1: Dow Jones Today: Stocks Took a Pre-Holiday Breather.NEWS2: Teladoc Stock Is Poised for More Explosive Growth Ahead.NEWS3: Genoa Healthcare Opens 500th Pharmacy Serving Behavioral Health Patients.

Answer: Rise