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: ['45', 'n', 'u', '199', 'y', 'w']

A: 1, 4, 5, 9
****
Q: ['449', '427', 'g', '397', '439', 'f', 'b', 'z', 't', 'f', 's', '379', 'o']

A: 2, 3, 4, 7, 9
****
Q: ['u', 'i', 'h', '231', '199', 'v', '279', 'd', '251']

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