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: ['121', 'm', 'n', '143', '281', 'c', 'j']

SOLUTION: 1, 2, 3, 4, 8

PROBLEM: ['h', 'l', '43', 'b', 'g', '265', '355', 'y']

SOLUTION: 2, 3, 4, 5, 6

PROBLEM: ['v', '491', 'o', 'v', '375', 'f', 'h', 'x', 'p', '97', '345', 'o', 'e', '41', 'y']

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