Union
$$A \cup B =$$
{ Comedy, Overcoming the Monster, Rags to Riches, Rebirth, The Quest, Tragedy, Voyage and Return, earth, fire, void, water, wind }
Symmetric Difference
$$A \ominus B =$$
{ Comedy, Overcoming the Monster, Rags to Riches, Rebirth, The Quest, Tragedy, Voyage and Return, earth, fire, void, water, wind }
Cartesian Product
$$A \times B =$$
{ (earth, Comedy),
(earth, Overcoming the Monster),
(earth, Rags to Riches),
(earth, Rebirth),
(earth, The Quest),
(earth, Tragedy),
(earth, Voyage and Return),
(fire, Comedy),
(fire, Overcoming the Monster),
(fire, Rags to Riches),
(fire, Rebirth),
(fire, The Quest),
(fire, Tragedy),
(fire, Voyage and Return),
(void, Comedy),
(void, Overcoming the Monster),
(void, Rags to Riches),
(void, Rebirth),
(void, The Quest),
(void, Tragedy),
(void, Voyage and Return),
(water, Comedy),
(water, Overcoming the Monster),
(water, Rags to Riches),
(water, Rebirth),
(water, The Quest),
(water, Tragedy),
(water, Voyage and Return),
(wind, Comedy),
(wind, Overcoming the Monster),
(wind, Rags to Riches),
(wind, Rebirth),
(wind, The Quest),
(wind, Tragedy),
(wind, Voyage and Return) }
The Seven Basic Plots