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: ['i', '127', 'j', 'z', '489', '359', 'i', 'j', 'y', 'p', 'm', 'z']

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

PROBLEM: ['479', 's', 'g']

SOLUTION: 4, 7, 9

PROBLEM: ['251', 'k', '195', 'y', '269', 'r', '207', 'i', '413', '259']

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