Input data for Venn Diagram
. .
Three sets:
  A:   B:   C:
A:
Only A:
Only B and C:
Both B and C == B∩C:
Either B∪C:
NONE:
ALL THREE:
B:
Only B:
Only A and C:
Both A and C == A∩C:
Either A∪C:
ONLY ONE:
AT LEAST TWO:
C:
Only C:
Only A and B:
Both A and B == A∩B:
Either A∪B:
ONLY TWO:
EVERYONE: