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: ['187', '461', 'b']

Answer: 1, 4, 6, 7, 8


Question: ['t', 'r', 'z']

Answer: -1


Question: ['17', 'd', '291', 'o', '459']

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


