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:
['333', '207', '13', '339', 'n', '387']
answer:
0, 1, 2, 3, 7, 8, 9


question:
['i', '249', '287']
answer:
2, 4, 7, 8, 9


question:
['t', '435', 'c', '303', '329', '159', 'u', '381', 'l', 'f', '99', '211', 'e']
answer:

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