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: ['h', 'i', 'e', '319', 'g', '187', '395', 'f', '327', 'y']

SOLUTION: 1, 2, 3, 5, 7, 8, 9

PROBLEM: ['a', '491', '477', '193', 'b', 'l', 'c']

SOLUTION: 1, 3, 4, 7, 9

PROBLEM: ['173', 'r', 'a', 'n', 'h', 'o', 'w', '135', '321', '59', 'r', '295', 'r']

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