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: ['183', '235', 'a', '261', 'z', 'n', 's', 'q', 'm', '311', '399', '457']

SOLUTION: 1, 2, 3, 4, 5, 6, 7, 8, 9

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

SOLUTION: 2, 3, 4, 5, 6

PROBLEM: ['179', 'c', 'h', 'c', '473', '355', '313', 'f', 't', '41', 'u']

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