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: ['109', 'b']

SOLUTION: 0, 1, 9

PROBLEM: ['359', '233', '455', '449', 'h']

SOLUTION: 2, 3, 4, 5, 9

PROBLEM: ['395', '93', '311', '267', 'f']

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

