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

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

PROBLEM: ['183', '89', '35', 'e', 'e', '499', 'e', 'u', 'y', 'o', 'f', 'l']

SOLUTION: 1, 3, 4, 5, 8, 9

PROBLEM: ['k', '301', 'b', '247', '5', '189']

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