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

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

PROBLEM: ['197', 'p', 'e', '217', '327', '439', '59', 'o', '355', 'z']

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

PROBLEM: ['u', '341', '151', '1', '157', '211', '189']

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