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: ['p', 't', '211', 'r', '439', 'h', 'g', 'c', '299', '371']

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

PROBLEM: ['w', '167', 'r', '485', 'g', 'm', 'x', 'n', '127', '359', '243', 'v', '3']

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