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:2018-02-22, Stock:UNH, The news for the past five days is as follows:
2018-02-14: NEWS1: Boeing and these other Dow stocks outperform when inflation is running hotter.NEWS2: UnitedHealth Group Board Authorizes Payment of Quarterly Dividend to Shareholders.
2018-02-15: NEWS1: Dow Logs Longest Win Streak of 2018.NEWS2: Dow Logs Longest Win Streak of 2018.NEWS3: Market Close Report: NASDAQ Composite index closes at 7,256.43 up 112.81 points.NEWS4: Market Close Report: NASDAQ Composite index closes at 7,256.43 up 112.81 points.NEWS5: Dow Movers: UNH, CSCO.NEWS6: Dow Movers: UNH, CSCO.NEWS7: UnitedHealth, Walgreens Partner To Put Urgent Care Next To Pharmacies.NEWS8: William McNabb Joins UnitedHealth Group Board of Directors.
2018-02-16: NEWS1: Close Update: Wall Street Pares Gains But Markets Post First Weekly Advance in Three.NEWS2: Close Update: Wall Street Pares Gains But Markets Post First Weekly Advance in Three.NEWS3: Wall Street Pares Gains But Markets Head for First Weekly Advance in Three.NEWS4: Wall Street Pares Gains But Markets Head for First Weekly Advance in Three.NEWS5: United Health Foundation, Cankdeska Cikana Community College Launch New $1.2 Million Partnership to Expand Access to Substance Abuse Treatment for the Spirit Lake Dakota Community.NEWS6: Anthem Buys America's 1st Choice, Expands in Medicare Market.NEWS7: Anthem Buys America's 1st Choice, Expands in Medicare Market.
2018-02-20: NEWS1: How Was Community Health Systems’ Financial Performance in 3Q17?.NEWS2: What Analysts Recommend for Community Health Systems.NEWS3: How Community Health Systems’ Segments Performed in 3Q17.NEWS4: iShares Russell 1000 Growth ETF Experiences Big Inflow.NEWS5: iShares Russell 1000 Growth ETF Experiences Big Inflow.NEWS6: Today’s Research Reports on Trending Tickers: UnitedHealth Group and Novartis.NEWS7: Report: Developing Opportunities within NewJersey Resources, Masimo, New Mountain Finance, Hess, Hologic, and UnitedHealth Group — Future Expectations, Projections Moving into 2018.
2018-02-21: nan

Answer: Rise