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: ['t', '175', '163', 'k', '279', '385', 'y', '71', 'g']

A: 1, 2, 3, 5, 6, 7, 8, 9
****
Q: ['s', '45']

A: 4, 5
****
Q: ['79', 'i', 'u', 'c', '263', '449', 'd', '55']

A:
2, 3, 4, 5, 6, 7, 9
****