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: ['421', '99', '115', 'x']

A: 1, 2, 4, 5, 9
****
Q: ['p', '231', 'd', 'i', '33', '431']

A: 1, 2, 3, 4
****
Q: ['155', 'x', '35', 's', '109', 's', '25', 's', '335', 'j', 'p', '377', '103']

A:
0, 1, 2, 3, 5, 7, 9
****