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: ['k', '233', 'h', 'd', 's', '83', '149', 'p', 'm']

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

PROBLEM: ['149', 'o', '237', 't', 'k', 'w']

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

PROBLEM: ['y', '301', 'c', 'l', 'x', '257', 'l', '1', 'r', '127', 'f', '157', '91', '423']

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