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: ['193', '195', '411', 'p', '161', 'j']

Answer: 1, 3, 4, 5, 6, 9


Question: ['t', '251', 'b', '241', 'z', '255']

Answer: 1, 2, 4, 5


Question: ['s', 't']

Answer:
-1