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:
['61', '255', 'u', '219', '197', 'i', '453', 'i', '267', '217', 'o', 'g']
answer:
1, 2, 3, 4, 5, 6, 7, 9


question:
['r', 'f', 'l', 'a', 'c', '489', 'e', 'p', 'm', '175', 'l']
answer:
1, 4, 5, 7, 8, 9


question:
['465', '241']
answer:

1, 2, 4, 5, 6