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: ['v', 'j', 'l', 'f', 'n', '185', 'x', '367']

A: 1, 3, 5, 6, 7, 8
****
Q: ['279', '115']

A: 1, 2, 5, 7, 9
****
Q: ['479', 'i']

A:
4, 7, 9
****