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: ['d', '335', '23', '461', '497', 'p', '313']

SOLUTION: 1, 2, 3, 4, 5, 6, 7, 9

PROBLEM: ['n', 'z', 'd', '359', '67', 'l', '257', 'f', 'i', 'q', 'e', '379', '75']

SOLUTION:
2, 3, 5, 6, 7, 9