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: ['k', '107', '333', '317', 'm', 'w', 'g', 'f']

SOLUTION: 0, 1, 3, 7

PROBLEM: ['493', '241', '239', 'g', 'q', '319', '49', '245']

SOLUTION: 1, 2, 3, 4, 5, 9

PROBLEM: ['79', 'm', 'm', 'q', '387', '91', '403', '193', 'w', 'q']

SOLUTION:
0, 1, 3, 4, 7, 8, 9