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: ['t', '419', 'f']

SOLUTION: 1, 4, 9

PROBLEM: ['207', 'w', '317', '241', 'j', '443']

SOLUTION: 0, 1, 2, 3, 4, 7

PROBLEM: ['y', '463', '381', '153', '93']

SOLUTION:
1, 3, 4, 5, 6, 8, 9