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:2021-08-19, Stock:COST, The news for the past five days is as follows:
2021-08-12: nan
2021-08-13: NEWS1: 3 No-Brainer Stocks to Consider if You're Worried About Inflation.
2021-08-16: nan
2021-08-17: NEWS1: Costco (COST) Stock Moves -0.11%: What You Should Know.NEWS2: Delta variant hasn't changed consumer behavior: Walmart CFO.NEWS3: 2 Solid Retail Stocks to Put in Your Shopping Basket.
2021-08-18: nan

Answer: Rise