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: ['w', '13', 'b', '455', 'b', 'k']

Answer: 1, 3, 4, 5


Question: ['j', '355', 'w', 'f', 'b', '183', '327', '277']

Answer: 1, 2, 3, 5, 7, 8


Question: ['b', 'v', 'a', 'o', 'b', 'x', '375', 'k', '137']

Answer:
1, 3, 5, 7