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

Answer: 1, 2, 4, 5, 9


Question: ['r', 'f', 'l', 'a', 'c', '489', 'e', 'p', 'm', '175', 'l']

Answer: 1, 4, 5, 7, 8, 9


Question: ['311', '251', 'x', '79', 't', '375', '175', 'i', '217', '359', '101', 'l']

Answer:
0, 1, 2, 3, 5, 7, 9