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: ['183', '89', '35', 'e', 'e', '499', 'e', 'u', 'y', 'o', 'f', 'l']

SOLUTION: 1, 3, 4, 5, 8, 9

PROBLEM: ['h', '281', 'x', '471']

SOLUTION: 1, 2, 4, 7, 8

PROBLEM: ['413', 'n', '203', '155', '383', '207', '63', '97', '245', '479', '187']

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