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: ['j', '355', 'w', 'f', 'b', '183', '327', '277']

SOLUTION: 1, 2, 3, 5, 7, 8

PROBLEM: ['489', 'y', 's', 'x', '203', 't', 'y', '461', 'v', 'k', '371', 'e']

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