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.
One example is below.
Q: ['q', '31', 'a', 'd', '53', '85', 'p', '77']
A: 1, 3, 5, 7, 8
Rationale: Here, the numbers in the list are '31', '53', '85' and '77', and the unique digits used in the list are '1, 3, 5, 7, 8' in ascending order.
Q: ['m', 'k', '289', 'k', '75', 'k', 'f', '129', '101', '69', 'q', 'x']
A:
0, 1, 2, 5, 6, 7, 8, 9