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: ['269', 'a', 'x', '395', '477', 'e', 'd', 'o', '129', 'j', '93', '237', '417', 'f']

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

PROBLEM: ['445', '91', '141', '185', 'b', 'k', 'f', 'l', 'i', '229', 't', 'v']

SOLUTION: 1, 2, 4, 5, 8, 9

PROBLEM: ['243', 'n', '445', 'y', '365', 'f', '75', 'j', '135', 'd', '461', 'u', '395', 'k', '479']

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