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: ['s', '291', '257', 'w', '497', '309']

A: 0, 1, 2, 3, 4, 5, 7, 9
****
Q: ['v', 'i', 'g', 'h']

A: -1
****
Q: ['481', '427', 'k', '323', '129', 'i', '83', 'c', '1', 'g', 't', 'y']

A:
1, 2, 3, 4, 7, 8, 9
****