Set of Sets/Examples/Set of Arbitrary Sets 2

Example of Set of Sets
Let $A$ be the set of (strictly) positive odd integers less than $8$.

Let $B$ be the set of (strictly) positive even integers less than $8$.

Then:

Let $\mathscr S = \set {A, B}$.

Then:
 * $\mathscr S = \set {\set {1, 3, 5, 7}, \set {2, 4, 6} }$