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:2019-12-24, Stock:UNH, The news for the past five days is as follows:
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.
2019-12-19: NEWS1: Dow Jones Today: The Great Melt Up Continues.NEWS2: Medicare insurer Centene expects big growth despite political turmoil.NEWS3: Cisco, Walgreens Boots share gains lead Dow's nearly 75-point climb.NEWS4: UnitedHealth Group Schedules Fourth Quarter and Full Year 2019 Earnings Release and Conference Call for January 15, 2020.
2019-12-20: nan
2019-12-23: NEWS1: UnitedHealth Group (UNH) Outpaces Stock Market Gains: What You Should Know.NEWS2: Year in Review 2019: Health care companies felt the heat in 2019.

Answer: Decrease