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:2019-12-31, Stock:UL, The news for the past five days is as follows:
2019-12-23: NEWS1: Online Retail Is Beginning to Look a Lot Like Real-World Retail.NEWS2: FTSE 100 and smaller stocks rise on the back of fall in sterling.
2019-12-24: nan
2019-12-26: nan
2019-12-27: nan
2019-12-30: nan

Answer: Decrease