A shop window with ads for discounts is seen on December 30, 2016 in Bydgoszcz, Poland. Bydgoszcz is the eighth-largest city in Poland.(Photo by Jaap Arriens/NurPhoto via Getty Images)
A shop window with ads for discounts is seen on December 30, 2016 in Bydgoszcz, Poland. Bydgoszcz is the eighth-largest city in Poland.(Photo by Jaap Arriens/NurPhoto via Getty Images)