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: ['159', 'y', '369', 'r', '341', '23', 's', '209', 'l', 's', '473']

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


Question: ['z', '271', 'h', 'm', '365']

Answer: 1, 2, 3, 5, 6, 7


Question: ['a', '109', 'b', 'a', '207']

Answer:
0, 1, 2, 7, 9