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: ['f', '135', 's', '269', 'x', '45', 'p', '141', 'e']

SOLUTION: 1, 2, 3, 4, 5, 6, 9

PROBLEM: ['439', '443', '175', 'e', 'm', '361', 'd']

SOLUTION: 1, 3, 4, 5, 6, 7, 9

PROBLEM: ['x', '491', '427', '95', 'k', 'q', '245', '385', '127', '281']

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