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: ['c', 'm', 'h', 'c', '69', '233', 'j', 'g', 'r', 'x', '59', 'p', '469']

A: 2, 3, 4, 5, 6, 9
****
Q: ['z', 'l', 's', '249', 'e', 'h', 'l']

A: 2, 4, 9
****
Q: ['279', '327', 'k']

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