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: ['c', '435', 'c', 'q', 'u', '191', 'b', 'l', '217']

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

PROBLEM: ['131', '483', 'k', '387', '451', 'j']

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

PROBLEM: ['165', 'h', 'i', 'c', '273']

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