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: ['165', 'k', 'a', 'v', 'u', '61', '327']

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

PROBLEM: ['395', 'p', '373']

SOLUTION: 3, 5, 7, 9

PROBLEM: ['87', 'f', 'k', '49', '293', 'c', '355', 't', 'e', 's', '45']

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