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

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

PROBLEM: ['p', '121', '55', '205', 'n', '393', 'l', 's', 'k', 'c', 'n']

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

PROBLEM: ['w', '249', '149', 'j', 'j', '177', '193', '205', '387', 'h', '451', '239']

SOLUTION:
0, 1, 2, 3, 4, 5, 7, 8, 9