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: ['247', 's', 'y', 'c', '421']

A: 1, 2, 4, 7
****
Q: ['v', '105', 'p', 'w', '295', '239', '453']

A: 0, 1, 2, 3, 4, 5, 9
****
Q: ['397', '13']

A:
1, 3, 7, 9
****
