Write union_sorted(a, b) that returns all different values found in a or b, as a sorted list.
union_sorted([1, 2], [2, 3]) → [1, 2, 3]
union_sorted([], []) → []
Submit runs 4 tests, including hidden edge cases.
Each hint gives a little more help. Try on your own first.
Run your code to see the output here.