An elderly janitor enters the classroom to clean it and sees an unanswered addition problem on the blackboard. The numbers bring back a memory that deeply affects the old man and perhaps changes his future.
1950
1987
1962
1953
1968
1972
1999
1996
1991
1961
1958
2001
1998
1957
1951
1974
1931
1952
1963
