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: ['u', 'z', 'p', '99', 'b']

Answer: 9


Question: ['291', '445', 'q', 't']

Answer: 1, 2, 4, 5, 9


Question: ['x', 'a', '381', 'k', 'n', 'm', '267', 'r', '193', 'f', 'h', 'r', '327', 'i', 'h']

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