instruction:
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.
question:
['v', 'q', '139', '79', '149', '469', 'g', '239', '221', 'v', '77']
answer:
1, 2, 3, 4, 6, 7, 9


question:
['227', '161', '389', 'g', 'g', 'i', 'm', '199', '487', '65', '341', '377', 'x', 'r']
answer:
1, 2, 3, 4, 5, 6, 7, 8, 9


question:
['39', '321', '261', 'y', '493']
answer:

1, 2, 3, 4, 6, 9