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:2018-05-31, Stock:RDS-B, The news for the past five days is as follows:
2018-05-23: nan
2018-05-24: NEWS1: Shell Makes Major Deepwater Discovery in Gulf of Mexico.NEWS2: Shell Makes Major Deepwater Discovery in Gulf of Mexico.
2018-05-25: NEWS1: Market Chatter: Pollution Worsening Around Two Royal Dutch Shell Oil Spills in Nigeria Due to Delayed Clean Up Efforts.NEWS2: Market Chatter: Pollution Worsening Around Two Royal Dutch Shell Oil Spills in Nigeria Due to Delayed Clean Up Efforts.
2018-05-29: nan
2018-05-30: nan

Answer: Decrease