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.

['257', '111', 'g', '277', '473', '105', 'x', '217']
0, 1, 2, 3, 4, 5, 7

['291', '445', 'q', 't']
1, 2, 4, 5, 9

['x', 'w', '77']

7