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: ['381', '277', 'g', '307', 'p', '105', '341', 'o', '313', '5', '375', '145', 'k']

Answer: 0, 1, 2, 3, 4, 5, 7, 8


Question: ['f', 'f', '149', '311', '331', 'l', 'u', '349', 'v', 'v', '417', '285']

Answer: 1, 2, 3, 4, 5, 7, 8, 9


Question: ['l', '175', '31', '429', '471']

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