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: ['j', 's', '127', 'o', 'e', '227', 'k', 'o']

SOLUTION: 1, 2, 7

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

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

PROBLEM: ['229', 'x', '49', 'p', '73', '77', '337', '497']

SOLUTION:
2, 3, 4, 7, 9