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:2021-12-20, Stock:NVO, The news for the past five days is as follows:
2021-12-13: NEWS1: Lilly (LLY) Inks Metabolic Disorders Therapy Development Deal.NEWS2: Novo Nordisk A/S – Share repurchase programme.NEWS3: Hedge Funds Are Warming Up To Novo Nordisk A/S (NVO).
2021-12-14: NEWS1: DICERNA INVESTOR ALERT BY THE FORMER ATTORNEY GENERAL OF LOUISIANA: Kahn Swick & Foti, LLC Investigates Adequacy of Price and Process in Proposed Sale of Dicerna Pharmaceuticals, Inc. - DRNA.
2021-12-15: nan
2021-12-16: nan
2021-12-17: NEWS1: Novo Nordisk announces supply challenges for Wegovy® in the US.NEWS2: Novo Nordisk Down After Word It Won't Meet H1 2022  Wegovy Demand.

Answer: Decrease