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', 'u', '179', 'e', '279', 'a', '151', '173', 'e', '61', '213']

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

PROBLEM: ['m', '221', '261', '175', '183', '359', 'h', '157', 'p', 'r', 'c', 'g', '193', 's']

SOLUTION: 1, 2, 3, 5, 6, 7, 8, 9

PROBLEM: ['409', '281', 'm', 'j', '453', 'o', 't', 'i', 'x', 'p', '423']

SOLUTION:
0, 1, 2, 3, 4, 5, 8, 9