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:
['z', 'e', '75', '379', 'c', 'f', 'g', '381', 'l', 'u', '197', '489']
answer:
1, 3, 4, 5, 7, 8, 9


question:
['g', 't', '31', 't', 's']
answer:
1, 3


question:
['149', '307', '101', '159']
answer:

0, 1, 3, 4, 5, 7, 9