Union
$$A \cup B =$$
{ adenine, becoming, being, cause, cytosine, effect, essence, existence, guanine, life, many, mechanism, one, thymine, universal }
Symmetric Difference
$$A \ominus B =$$
{ adenine, becoming, being, cause, cytosine, effect, essence, existence, guanine, life, many, mechanism, one, thymine, universal }
Cartesian Product
$$A \times B =$$
{ (adenine, becoming),
(adenine, being),
(adenine, cause),
(adenine, effect),
(adenine, essence),
(adenine, existence),
(adenine, life),
(adenine, many),
(adenine, mechanism),
(adenine, one),
(adenine, universal),
(cytosine, becoming),
(cytosine, being),
(cytosine, cause),
(cytosine, effect),
(cytosine, essence),
(cytosine, existence),
(cytosine, life),
(cytosine, many),
(cytosine, mechanism),
(cytosine, one),
(cytosine, universal),
(guanine, becoming),
(guanine, being),
(guanine, cause),
(guanine, effect),
(guanine, essence),
(guanine, existence),
(guanine, life),
(guanine, many),
(guanine, mechanism),
(guanine, one),
(guanine, universal),
(thymine, becoming),
(thymine, being),
(thymine, cause),
(thymine, effect),
(thymine, essence),
(thymine, existence),
(thymine, life),
(thymine, many),
(thymine, mechanism),
(thymine, one),
(thymine, universal) }
Nucleobase