Union
$$A \cup B =$$
{ acceptance, anger, bargaining, charity, denial, depression, devotion, fasting, pilgrimage, prayer, purity, struggle }
Symmetric Difference
$$A \ominus B =$$
{ acceptance, anger, bargaining, charity, denial, depression, devotion, fasting, pilgrimage, prayer, purity, struggle }
Cartesian Product
$$A \times B =$$
{ (acceptance, charity),
(acceptance, devotion),
(acceptance, fasting),
(acceptance, pilgrimage),
(acceptance, prayer),
(acceptance, purity),
(acceptance, struggle),
(anger, charity),
(anger, devotion),
(anger, fasting),
(anger, pilgrimage),
(anger, prayer),
(anger, purity),
(anger, struggle),
(bargaining, charity),
(bargaining, devotion),
(bargaining, fasting),
(bargaining, pilgrimage),
(bargaining, prayer),
(bargaining, purity),
(bargaining, struggle),
(denial, charity),
(denial, devotion),
(denial, fasting),
(denial, pilgrimage),
(denial, prayer),
(denial, purity),
(denial, struggle),
(depression, charity),
(depression, devotion),
(depression, fasting),
(depression, pilgrimage),
(depression, prayer),
(depression, purity),
(depression, struggle) }
Kübler-Ross model