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: ['291', 'p', '261', 'z', '21', 'w', 't', '417']

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

PROBLEM: ['175', 'c', 'c']

SOLUTION: 1, 5, 7

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

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