Members of set A:
-----------------
blue
cyan
green
magenta
red
yellow
-----------------

Members of set B:
-----------------
black
blue
green
red
white
-----------------

The union of sets A and B:
--------------------------
black
blue
cyan
green
magenta
red
white
yellow
--------------------------

The exclusive disjunction of sets A and B:
------------------------------------------
black
cyan
magenta
white
yellow
------------------------------------------

The intersection of sets A and B:
---------------------------------
blue
green
red
---------------------------------
The previous set is a subset of set A
The previous set is a subset of set B

There are no command-line arguments to test for set membership.
done
