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.
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Question: ['t', 'y', '331']

Answer: 1, 3


Question: ['o', '61', '475', '457', 'a', 'o', 'z', '227', '415', 'z', 'x', 'y', '73', '205', 'y']

Answer: 0, 1, 2, 3, 4, 5, 6, 7


Question: ['m', '221', '261', '175', '183', '359', 'h', '157', 'p', 'r', 'c', 'g', '193', 's']

Answer:
1, 2, 3, 5, 6, 7, 8, 9