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.
Example: ['q', '31', 'a', 'd', '53', '85', 'p', '77']
Example solution: 1, 3, 5, 7, 8
Example explanation: Here, the numbers in the list are '31', '53', '85' and '77', and the unique digits used in the list are '1, 3, 5, 7, 8' in ascending order.

Problem: ['257', '111', 'g', '277', '473', '105', 'x', '217']

Solution: 0, 1, 2, 3, 4, 5, 7