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:
['t', 'p', 'j', 'x', 'k', '295', '221', '261', '221', 'b', '431', '427']
answer:
1, 2, 3, 4, 5, 6, 7, 9


question:
['f', '135', 's', '269', 'x', '45', 'p', '141', 'e']
answer:
1, 2, 3, 4, 5, 6, 9


question:
['9', '453', '265', '303', '33', 'g', '139', '39', '383', '185', 'i', '467', 't', '171', 'r']
answer:

0, 1, 2, 3, 4, 5, 6, 7, 8, 9