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: ['233', '35', 'l', 'j', '89', 'r', 't']

SOLUTION: 2, 3, 5, 8, 9

PROBLEM: ['497', '21', '239', '487', '149', 'q']

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

PROBLEM: ['109', 'h', 'g', '219', '337', 'o']

SOLUTION:
0, 1, 2, 3, 7, 9