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.

['247', 's', 'y', 'c', '421']
1, 2, 4, 7

['t', 'p', 'j', 'x', 'k', '295', '221', '261', '221', 'b', '431', '427']
1, 2, 3, 4, 5, 6, 7, 9

['s', '387', 'e', '201', 'k', 'q', 'm']

0, 1, 2, 3, 7, 8