Union
$$A \cup B =$$
{ darkness, electric, fossil, goodness, gravitational, hydric, organic, passion, solar, thermal, wind }
Symmetric Difference
$$A \ominus B =$$
{ darkness, electric, fossil, goodness, gravitational, hydric, organic, passion, solar, thermal, wind }
Difference
$$B - A =$$
{ electric, fossil, gravitational, hydric, organic, solar, thermal, wind }
Cartesian Product
$$A \times B =$$
{ (darkness, electric),
(darkness, fossil),
(darkness, gravitational),
(darkness, hydric),
(darkness, organic),
(darkness, solar),
(darkness, thermal),
(darkness, wind),
(goodness, electric),
(goodness, fossil),
(goodness, gravitational),
(goodness, hydric),
(goodness, organic),
(goodness, solar),
(goodness, thermal),
(goodness, wind),
(passion, electric),
(passion, fossil),
(passion, gravitational),
(passion, hydric),
(passion, organic),
(passion, solar),
(passion, thermal),
(passion, wind) }
Guṇa