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: ['401', 'a', '273', 'c', '117', 'x', 'b', 'h', 's', 'v']

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


Question: ['t', '251', 'b', '241', 'z', '255']

Answer: 1, 2, 4, 5


Question: ['261', 'm', '271', 'j', '479', 'n', 'f']

Answer:
1, 2, 4, 6, 7, 9