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: ['243', '125']

SOLUTION: 1, 2, 3, 4, 5

PROBLEM: ['q', 'y', '49', '497', 'a', 'f', 'v', 'x', 'f', '347', '183', '489']

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

PROBLEM: ['s', '127']

SOLUTION:
1, 2, 7