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

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


Question: ['h', 't', '371', 'e', '153', 'b']

Answer: 1, 3, 5, 7


Question: ['u', 'w', 'b', '455', '271', '255', '187', 'b', 'b', 'j', '219']

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