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: ['b', 'm', '471']

A: 1, 4, 7
****
Q: ['119', '329', 'w']

A: 1, 2, 3, 9
****
Q: ['n', 'i', '447', 'i', '131']

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