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:2019-12-20, Stock:UL, The news for the past five days is as follows:
2019-12-13: nan
2019-12-16: nan
2019-12-17: NEWS1: Unilever's stock suffering biggest selloff in 16 years after sales warning.NEWS2: Unilever Plunges 8% After Disappointing Guidance Update.NEWS3: Unilever Slumps as New CEO Faces Slowest Growth in a Decade.NEWS4: Unilever Lowers Sales Target For 2020 As Asian Economies Slow Down.NEWS5: Unilever Stock is Sliding Because Sales Growth Will Remain Sluggish into 2020.NEWS6: Unilever Might Be Better Off Out of the Food Business.NEWS7: Unilever Might Be Better Off Out of the Food Business.NEWS8: Unilever shares slide after warning of sales miss.NEWS9: Unilever Sales Growth to Miss Guidance.NEWS10: Stocks - Boeing and Its Suppliers in Focus in Premarket.NEWS11: Unilever warns on 2019 sales.NEWS12: Unilever warns it will miss full-year sales targets.NEWS13: Unilever warns on underlying sales growth for 2019.NEWS14: Top 5 Things to Watch Out For on Dec. 17.NEWS15: Unilever: appetite suppressant.NEWS16: Premarket London: Unilever Warns of Sales Slowdown.
2019-12-18: NEWS1: Corporate News for Dec 18, 2019.NEWS2: Who will replace Paul Polman as the face of sustainable capitalism?.
2019-12-19: nan

Answer: Rise