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: ['157', 'k', 'o', 'a', '279', 'g']

SOLUTION: 1, 2, 5, 7, 9

PROBLEM: ['p', '103', 'd', '411', 'f']

SOLUTION: 0, 1, 3, 4

PROBLEM: ['s', 'z', 'l', 'b', '199', 'd', '41', '41', 'd', '265', '263', '177', '183', '219']

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