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: ['93', '277', '373', 'z', '9', 'r', '251', '207', 'v', 'n']

SOLUTION: 0, 1, 2, 3, 5, 7, 9

PROBLEM: ['425', 'a', '351', 'v']

SOLUTION: 1, 2, 3, 4, 5

PROBLEM: ['353', 'c', '421', '87', '215', 'd', 'i', 'g', '281', '263']

SOLUTION:
1, 2, 3, 4, 5, 6, 7, 8