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: ['363', '455']

SOLUTION: 3, 4, 5, 6

PROBLEM: ['f', 't', 'a', '163', '297', '97', '487', '341', '193']

SOLUTION: 1, 2, 3, 4, 6, 7, 8, 9

PROBLEM: ['243', 'o', '67', '479', 'p', 'h', 'y', 'e', '497', 'y', 'x', '257', '215', 'd', 'r']

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