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: ['143', 'i', '499', 't', '27']

Answer: 1, 2, 3, 4, 7, 9


Question: ['q', 'g', 'z', '309']

Answer: 0, 3, 9


Question: ['f', 'b', '19', '437', '91']

Answer:
1, 3, 4, 7, 9