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: ['e', 's', '153', 'e', '377', 'c', 'v', '437']

SOLUTION: 1, 3, 4, 5, 7

PROBLEM: ['181', '391', '115', '339', 't', 'f', 'z', '355', 'k', 'k', '243', 'b', '297']

SOLUTION:
1, 2, 3, 4, 5, 7, 8, 9