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.
1974
2005
2022
1999
2002
2001
2006
2018
1985
1994
2009
2024
1990
1939
2019
1976
2015
2011
