TASK DEFINITION: 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.
PROBLEM: ['w', '19', '61', 'j', 'o', 's', 'q', '391', '281', '491', '287']

SOLUTION: 1, 2, 3, 4, 6, 7, 8, 9

PROBLEM: ['i', '485', '109', 'e', '15', '461', 'r', 'l', '223', '327']

SOLUTION: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

PROBLEM: ['457', 'e', 'f']

SOLUTION:
4, 5, 7