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: ['f', 'f', '149', '311', '331', 'l', 'u', '349', 'v', 'v', '417', '285']

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

PROBLEM: ['109', 't', '283', 'c', 'u', 'y', '251', 'x', '377', 'n', 's', 'd', 't', 'q', 'o']

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

PROBLEM: ['d', '241', '483', '135', '399', '429', '435', '355', 't', 'e', 'h', '137']

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