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: ['391', 'y', '447', '345', '157', '265', 'x', '261', 'm', 'f', 'x', 'x', '379', 'r', 'g']

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


Question: ['99', 'p', 'v', '49', 's', '279', 'v', '287', '355', 'o', '131', 'd', 'b']

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


Question: ['y', '431', '239', '365', 'h', '305', 'p', '407']

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