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:2018-12-17, Stock:UNH, The news for the past five days is as follows:
2018-12-10: NEWS1: UnitedHealth Falls 3%.NEWS2: Has UnitedHealth Group (UNH) Outpaced Other Medical Stocks This Year?.NEWS3: Has UnitedHealth Group (UNH) Outpaced Other Medical Stocks This Year?.NEWS4: Has UnitedHealth Group (UNH) Outpaced Other Medical Stocks This Year?.NEWS5: UnitedHealthcare Expands Navigate4Me to Bring Personalized, Holistic Care to More People.
2018-12-11: NEWS1: Envision reaches deal in long-running dispute with insurance giant.NEWS2: As stocks, bonds and commodities flail, technician says one area of the market is safe.NEWS3: UnitedHealth Is Signaling a Buy.NEWS4: UnitedHealthcare Renews Contract with Envision Healthcare.
2018-12-12: NEWS1: UnitedHealth Group (UNH) Outpaces Stock Market Gains: What You Should Know.NEWS2: Markets Right Now: Stocks end higher on Wall Street.NEWS3: IVV, UNH, CMCSA, DIS: Large Outflows Detected at ETF.NEWS4: IVV, UNH, CMCSA, DIS: Large Outflows Detected at ETF.NEWS5: Microsoft, Amazon, Apple Are Top Holdings of U.S. Hedge Funds.NEWS6: Our Nation’s Health: Obesity Rate at All-Time High; Childhood Poverty Continues to Decline.NEWS7: Arizona Mayo Clinic CEO to join Minnesota-based health care giant.NEWS8: The Zacks Analyst Blog Highlights: UnitedHealth, Broadcom, CVS Health, FedEx and Oracle.NEWS9: The Zacks Analyst Blog Highlights: UnitedHealth, Broadcom, CVS Health, FedEx and Oracle.NEWS10: The Zacks Analyst Blog Highlights: UnitedHealth, Broadcom, CVS Health, FedEx and Oracle.
2018-12-13: NEWS1: UnitedHealthcare Insurance Company -- Moody's rates UnitedHealth Group's senior notes A3; outlook stable.NEWS2: Owens & Minor, Inc. (OMI) Ex-Dividend Date Scheduled for December 14, 2018.NEWS3: Owens & Minor, Inc. (OMI) Ex-Dividend Date Scheduled for December 14, 2018.NEWS4: UnitedHealth Group (UNH) Outpaces Stock Market Gains: What You Should Know.NEWS5: UnitedHealth Group (UNH) Outpaces Stock Market Gains: What You Should Know.
2018-12-14: NEWS1: UnitedHealth Falls 3%.

Answer: Decrease