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: ['k', 'a', '437', '461', 'b', '341', '175']

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


Question: ['p', '103', 'd', '411', 'f']

Answer: 0, 1, 3, 4


Question: ['e', '337', '13', 'v', 'k', 'p', 'p', 'r', '445', '417', 'g', 'z', '55', 'h', '463']

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