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: ['381', '129']

SOLUTION: 1, 2, 3, 8, 9

PROBLEM: ['j', 's', '127', 'o', 'e', '227', 'k', 'o']

SOLUTION: 1, 2, 7

PROBLEM: ['z', 'b', 'm', 'q', 'b', '45', 'j', '415', '495', 'z', '103']

SOLUTION:
0, 1, 3, 4, 5, 9