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: ['345', 'k']

A: 3, 4, 5
****
Q: ['z', 'e', '75', '379', 'c', 'f', 'g', '381', 'l', 'u', '197', '489']

A: 1, 3, 4, 5, 7, 8, 9
****
Q: ['377', 'n', '47', '271', 'y', 'z', '299', '297']

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