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: ['f', 't', 'a', '163', '297', '97', '487', '341', '193']

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

PROBLEM: ['i', '485', '109', 'e', '15', '461', 'r', 'l', '223', '327']

SOLUTION: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

PROBLEM: ['v', 'o', 'e', 'a', '419', 't', 's', '343', '343']

SOLUTION:
1, 3, 4, 9