Union
$$A \cup B =$$
{ aquarius, bitter, leo, salty, savory, scorpio, sour, sweet, taurus }
Symmetric Difference
$$A \ominus B =$$
{ aquarius, bitter, leo, salty, savory, scorpio, sour, sweet, taurus }
Difference
$$A - B =$$
{ aquarius, leo, scorpio, taurus }
Difference
$$B - A =$$
{ bitter, salty, savory, sour, sweet }
Cartesian Product
$$A \times B =$$
{ (aquarius, bitter),
(aquarius, salty),
(aquarius, savory),
(aquarius, sour),
(aquarius, sweet),
(leo, bitter),
(leo, salty),
(leo, savory),
(leo, sour),
(leo, sweet),
(scorpio, bitter),
(scorpio, salty),
(scorpio, savory),
(scorpio, sour),
(scorpio, sweet),
(taurus, bitter),
(taurus, salty),
(taurus, savory),
(taurus, sour),
(taurus, sweet) }
Astrological sign