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: ['109', 'b']

SOLUTION: 0, 1, 9

PROBLEM: ['h', 'l', 'x', 'v', 'v', '413', 'p', '45', '105', '183', 'p', 'k']

SOLUTION: 0, 1, 3, 4, 5, 8

PROBLEM: ['489', 'w', '157', 'u', '41']

SOLUTION:
1, 4, 5, 7, 8, 9