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: ['165', '219', 'r', 's', '191', 'k', '39']

SOLUTION: 1, 2, 3, 5, 6, 9

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

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

PROBLEM: ['175', 'f', 'j', 'e', '81', 'b', '327', 'c', '387', '283', 'p', 'p', '39']

SOLUTION:
1, 2, 3, 5, 7, 8, 9