In this task, you are given an input list A. You need to extract and sort the unique digits used in the list in ascending order. Return -1 if there is no digit in the list.

Q: ['s', '291', '257', 'w', '497', '309']

A: 0, 1, 2, 3, 4, 5, 7, 9
****
Q: ['u', 'r']

A: -1
****
Q: ['r', '75', 'n', 'q', '371', 'c', '369', 'a', 'q', '349', 'm', '217', '39', '375', 't']

A:
1, 2, 3, 4, 5, 6, 7, 9
****