Union
$$A \cup B =$$
{ acceptance, adenine, anger, bargaining, cytosine, denial, depression, guanine, thymine }
Symmetric Difference
$$A \ominus B =$$
{ acceptance, adenine, anger, bargaining, cytosine, denial, depression, guanine, thymine }
Difference
$$A - B =$$
{ acceptance, anger, bargaining, denial, depression }
Difference
$$B - A =$$
{ adenine, cytosine, guanine, thymine }
Cartesian Product
$$A \times B =$$
{ (acceptance, adenine),
(acceptance, cytosine),
(acceptance, guanine),
(acceptance, thymine),
(anger, adenine),
(anger, cytosine),
(anger, guanine),
(anger, thymine),
(bargaining, adenine),
(bargaining, cytosine),
(bargaining, guanine),
(bargaining, thymine),
(denial, adenine),
(denial, cytosine),
(denial, guanine),
(denial, thymine),
(depression, adenine),
(depression, cytosine),
(depression, guanine),
(depression, thymine) }
Kübler-Ross model