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: ['149', '129', 'k']

Answer: 1, 2, 4, 9


Question: ['u', 'h', 'z', '227', '497', '381', '101', '453', '5']

Answer: 0, 1, 2, 3, 4, 5, 7, 8, 9


Question: ['277', '339', '175', 'x', 'r', 'p', '73', '371']

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