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.
--------
Question: ['h', '475', 'x', '53', '461', 'c']

Answer: 1, 3, 4, 5, 6, 7


Question: ['j', 'w', 'h', 'r', 'w', 'h', 'd', 'f', '81', 'g', '145']

Answer: 1, 4, 5, 8


Question: ['x', '355', 'i', 'o', 'q', '295', 'q', '431', 'o', '305', 'a', 's', 'p']

Answer:
0, 1, 2, 3, 4, 5, 9