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: ['w', 'b', 'w', 'm', 'j', 'd', 'q', '47', '221', 'b', '201', 'f']

SOLUTION: 0, 1, 2, 4, 7

PROBLEM: ['h', '309', 'q', 'w', '367', '245', '181', 'w', '377', '33']

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

PROBLEM: ['101', '371', '427', 'j', 'r', '353', 'd', '461', 'n', '59', '25', 'i', 'h', 'v']

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