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: ['z', 'v', 't', 'm', '51', 'e', 'l', 'l', '83', '301', '21', '347', 'm', '41', 'b']

SOLUTION: 0, 1, 2, 3, 4, 5, 7, 8

PROBLEM: ['95', '205', 'c', '101']

SOLUTION: 0, 1, 2, 5, 9

PROBLEM: ['407', 'o', 'c', '487', '23', '489', '459', 'o', '159']

SOLUTION:
0, 1, 2, 3, 4, 5, 7, 8, 9