Union
$$A \cup B =$$
{ accomodator, assimilator, converger, disease, diverger, earthquake, fire, flood, hurricane, lightning, meteor, volcano }
Symmetric Difference
$$A \ominus B =$$
{ accomodator, assimilator, converger, disease, diverger, earthquake, fire, flood, hurricane, lightning, meteor, volcano }
Difference
$$A - B =$$
{ disease, earthquake, fire, flood, hurricane, lightning, meteor, volcano }
Cartesian Product
$$A \times B =$$
{ (disease, accomodator),
(disease, assimilator),
(disease, converger),
(disease, diverger),
(earthquake, accomodator),
(earthquake, assimilator),
(earthquake, converger),
(earthquake, diverger),
(fire, accomodator),
(fire, assimilator),
(fire, converger),
(fire, diverger),
(flood, accomodator),
(flood, assimilator),
(flood, converger),
(flood, diverger),
(hurricane, accomodator),
(hurricane, assimilator),
(hurricane, converger),
(hurricane, diverger),
(lightning, accomodator),
(lightning, assimilator),
(lightning, converger),
(lightning, diverger),
(meteor, accomodator),
(meteor, assimilator),
(meteor, converger),
(meteor, diverger),
(volcano, accomodator),
(volcano, assimilator),
(volcano, converger),
(volcano, diverger) }
Bagua