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:
['87', '139', 'y', '129', '255', '227', '103', 'j']
answer:
0, 1, 2, 3, 5, 7, 8, 9


question:
['299', '371', '313', '17', 't', 'q']
answer:
1, 2, 3, 7, 9


question:
['p', 'f', 'y', 'e', '107', 'q', '57', '331', '33', '287', 'u', 'u']
answer:

0, 1, 2, 3, 5, 7, 8