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: ['e', '325', '377', 'v', '35', 'n', '125', '195']

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

PROBLEM: ['213', '51', '31', 'n', '89', '113', '315', '195', 'd', 'x', '105', '217', '295']

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

PROBLEM: ['283', '461', 'n', '65', '459', '289', '275', '471', '435', 's', '209', '185', 's']

SOLUTION:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9