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: ['25', 'n', 'n', '481', 'w', '91', '251']

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

PROBLEM: ['299', '95', 'd', '423', 'q', 'u', '167', '209', '477', 'h', 'k', 'a', '213']

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

PROBLEM: ['x', 'd', '399', 'e', 's', '419', '247', '415', '465', 'v', 'g', '91', 'j', 'y', '13']

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