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:2021-07-28, Stock:COST, The news for the past five days is as follows:
2021-07-21: NEWS1: Uber, Costco Launch Grocery Delivery Pilot In Texas.NEWS2: BIG or COST: Which Is the Better Value Stock Right Now?.NEWS3: Uber and Costco kick off grocery delivery pilot in Texas.
2021-07-22: NEWS1: Costco (COST)-Uber Alliance to Expedite Grocery Delivery.NEWS2: Major websites begin to come back following widespread outage.
2021-07-23: NEWS1: Shareholders Of Costco Wholesale (NASDAQ:COST) Must Be Happy With Their 182% Total Return.NEWS2: Zacks Industry Outlook Highlights: Costco Wholesale, Target, Dollar General, Burlington Stores and Dollar Tree.
2021-07-26: NEWS1: Costco will raise membership fees about 8%, Stifel forecasts.
2021-07-27: nan

Answer: Decrease