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: ['p', 'p', '91']

Answer: 1, 9


Question: ['b', 'n', '369', '199', 'r', '165', '63', 'y', '331', '57']

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


Question: ['277', '149', 'm', '101', '165', '401']

Answer:
0, 1, 2, 4, 5, 6, 7, 9