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: ['103', '355', '417', 'e', '359', 'c', 'w', 'q', '237', '93', '431', '59', 'l', '121']

SOLUTION: 0, 1, 2, 3, 4, 5, 7, 9

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

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

PROBLEM: ['369', '195', 'i', '335', 'u', 'z', '265', 'n', '173', 'b', 'h', 'q']

SOLUTION:
1, 2, 3, 5, 6, 7, 9