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: ['197', 'p', 'e', '217', '327', '439', '59', 'o', '355', 'z']

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

PROBLEM: ['c', '435', 'c', 'q', 'u', '191', 'b', 'l', '217']

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

PROBLEM: ['45', 'g', '105', 'g', '271', '35', '349', 'y', 'h', '391', '431', '31', '9', '89', 'n']

SOLUTION:
0, 1, 2, 3, 4, 5, 7, 8, 9