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: ['r', '273', 'h', '421', 'k', 'r', 'k', 't', 'x', 's', 'j']

Answer: 1, 2, 3, 4, 7


Question: ['a', '491', '477', '193', 'b', 'l', 'c']

Answer: 1, 3, 4, 7, 9


Question: ['161', '79', '457', 'z', '487', '491', '359', '261', '365', '423', '263', 'b', 'n', '193']

Answer:
1, 2, 3, 4, 5, 6, 7, 8, 9