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: ['185', '425']

SOLUTION: 1, 2, 4, 5, 8

PROBLEM: ['119', '189', 'k', 'e', '425', '21', '245']

SOLUTION: 1, 2, 4, 5, 8, 9

PROBLEM: ['j', 'y', 'j', '233', '473', 'q', 'v', 'j', '5', 'v', '233', '249', 'v', '209']

SOLUTION:
0, 2, 3, 4, 5, 7, 9