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: ['211', 'v', 'a', '445', '185', '135', 'v', 'w', 'b', '155', '315', '1']

Answer: 1, 2, 3, 4, 5, 8


Question: ['r', '171', 'p', '299', 'u', 'n', '421', '331', 'h', '21', 'h', 'x', '435', '327', '373']

Answer: 1, 2, 3, 4, 5, 7, 9


Question: ['x', 'e', 'e', '131', 'q']

Answer:
1, 3