The doors of the jam produced by a company do not open. In order for them to be able to sell their jam, they reward the one who can open the jam. All the people try to open the door of the jam.
2005
1944
2013
1976
2001
2022
2009
1994
2003
2002
1974
2017
1939
2018
2011
2006
1990
2019