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: ['v', 'i', 'g', 'h']

Answer: -1


Question: ['305', '447', '125', 'c', '469', '231', 'c', '33', 'r', '69', 'p', 'b', '143']

Answer: 0, 1, 2, 3, 4, 5, 6, 7, 9


Question: ['219', '463', '133']

Answer:
1, 2, 3, 4, 6, 9