Union
$$A \cup B =$$
{ attaching, creative, danger, earth, exciting, fire, keeping still, metal, receptive, serene, soft, water, wood }
Symmetric Difference
$$A \ominus B =$$
{ attaching, creative, danger, earth, exciting, fire, keeping still, metal, receptive, serene, soft, water, wood }
Cartesian Product
$$A \times B =$$
{ (attaching, earth),
(attaching, fire),
(attaching, metal),
(attaching, water),
(attaching, wood),
(creative, earth),
(creative, fire),
(creative, metal),
(creative, water),
(creative, wood),
(danger, earth),
(danger, fire),
(danger, metal),
(danger, water),
(danger, wood),
(exciting, earth),
(exciting, fire),
(exciting, metal),
(exciting, water),
(exciting, wood),
(keeping still, earth),
(keeping still, fire),
(keeping still, metal),
(keeping still, water),
(keeping still, wood),
(receptive, earth),
(receptive, fire),
(receptive, metal),
(receptive, water),
(receptive, wood),
(serene, earth),
(serene, fire),
(serene, metal),
(serene, water),
(serene, wood),
(soft, earth),
(soft, fire),
(soft, metal),
(soft, water),
(soft, wood) }
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