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: ['489', 'y', 's', 'x', '203', 't', 'y', '461', 'v', 'k', '371', 'e']

Answer: 0, 1, 2, 3, 4, 6, 7, 8, 9


Question: ['w', 't', 'a', '199', '385']

Answer: 1, 3, 5, 8, 9


Question: ['31', 'a', 'a', 'h', '483', '223', '437', '285', '433', '463', 'g', '377', 'r', 'i', '161']

Answer:
1, 2, 3, 4, 5, 6, 7, 8