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:2018-12-31, Stock:PSA, The news for the past five days is as follows:
2018-12-21: NEWS1: 3 Stocks I'll Hold Forever.NEWS2: 3 Stocks I'll Hold Forever.NEWS3: 3 Stocks I&apos;ll Hold Forever.
2018-12-24: nan
2018-12-26: nan
2018-12-27: NEWS1: PSA Crosses Above 4% Yield Territory.NEWS2: PSA Crosses Above 4% Yield Territory.NEWS3: Public Storage CEO and CFO Succession Commences.NEWS4: Is Public Storage a Buy?.NEWS5: Common Stock vs. Preferred Stock: What's the Difference?.NEWS6: Common Stock vs. Preferred Stock: What's the Difference?.NEWS7: Common Stock vs. Preferred Stock: What&apos;s the Difference?.
2018-12-28: NEWS1: February 2019 Options Now Available For Public Storage (PSA).NEWS2: February 2019 Options Now Available For Public Storage (PSA).

Answer: Rise