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: ['a', '55', 's', '71', '271', '211']

A: 1, 2, 5, 7
****
Q: ['173', 'r', 'a', 'n', 'h', 'o', 'w', '135', '321', '59', 'r', '295', 'r']

A: 1, 2, 3, 5, 7, 9
****
Q: ['w', 'h', '169', 's', 'n', 'i', 'a', 'e', 'f', 'u']

A:
1, 6, 9
****