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: ['473', '449', '357', 'p', 'p', 'e', '377', '77']

A: 3, 4, 5, 7, 9
****
Q: ['387', '7', '93', '105', '181']

A: 0, 1, 3, 5, 7, 8, 9
****
Q: ['z', 'g', '481', '179', '39']

A:
1, 3, 4, 7, 8, 9
****