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: ['285', 'f', '469', 'b', '161', 'q', 'l']

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


Question: ['479', 's', 'g']

Answer: 4, 7, 9


Question: ['207', '355', 'p', 'c', 'q', '405', 'o', '461', '51', 't', '379', 'x', '309']

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