Union
$$A \cup B =$$
{ fable, fairy-tale, folk-tale, forward/back, left/right, myth, pitch, roll, saga, up/down, yaw }
Symmetric Difference
$$A \ominus B =$$
{ fable, fairy-tale, folk-tale, forward/back, left/right, myth, pitch, roll, saga, up/down, yaw }
Cartesian Product
$$A \times B =$$
{ (fable, forward/back),
(fable, left/right),
(fable, pitch),
(fable, roll),
(fable, up/down),
(fable, yaw),
(fairy-tale, forward/back),
(fairy-tale, left/right),
(fairy-tale, pitch),
(fairy-tale, roll),
(fairy-tale, up/down),
(fairy-tale, yaw),
(folk-tale, forward/back),
(folk-tale, left/right),
(folk-tale, pitch),
(folk-tale, roll),
(folk-tale, up/down),
(folk-tale, yaw),
(myth, forward/back),
(myth, left/right),
(myth, pitch),
(myth, roll),
(myth, up/down),
(myth, yaw),
(saga, forward/back),
(saga, left/right),
(saga, pitch),
(saga, roll),
(saga, up/down),
(saga, yaw) }