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', '437', 'o', 'w', 'x', 'e', 'r', 'r', '149', 'd', '391']
answer:
1, 3, 4, 7, 9


question:
['u', '157', '63', '411', 'x', 'c', 'k', 'z', 'i', '279', '311', '431']
answer:
1, 2, 3, 4, 5, 6, 7, 9


question:
['h', '289', '59', 't', '211', 'q', '75', '389', '345']
answer:

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