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:2018-12-17, Stock:Unp, The news for the past five days is as follows:
2018-12-10: NEWS1: How Rail Traffic Trended for Canadian National in Week 48.NEWS2: Analysis: Positioning to Benefit within Newmark Group, Amphenol, First American Financial, Union Pacific, Campbell Soup, and Goldcorp — Research Highlights Growth, Revenue, and Consolidated Results.NEWS3: Canadian Pacific’s Carload Traffic Growth Was Highest among Peers.
2018-12-11: NEWS1: Weak Carload Performance Hurt Kansas City’s Rail Traffic Volume.NEWS2: Union Pacific a Top Socially Responsible Dividend Stock With 2.2% Yield (UNP).NEWS3: Union Pacific a Top Socially Responsible Dividend Stock With 2.2% Yield (UNP).NEWS4: BNSF Railway Has Worst Rail Traffic Performance among Peers.
2018-12-12: nan
2018-12-13: NEWS1: UNP Crosses Below Key Moving Average Level.NEWS2: UNP Crosses Below Key Moving Average Level.NEWS3: Notable Thursday Option Activity: UNP, NSC, SAM.NEWS4: Notable Thursday Option Activity: UNP, NSC, SAM.NEWS5: UNP February 2019 Options Begin Trading.NEWS6: UNP February 2019 Options Begin Trading.NEWS7: See what the IHS Markit Score report has to say about Union Pacific Corp..
2018-12-14: NEWS1: UNP’s Intermodal Traffic Growth Was the Highest among Its Peers.NEWS2: Kansas City Southern: Top Rail Traffic Volume Gainer in Week 49.NEWS3: Week 49: US Rail Freight Traffic Growth Rebounded.NEWS4: See what the IHS Markit Score report has to say about Union Pacific Corp..

Answer: Decrease