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: ['161', '433', '373', '225', '161', 'b', '179', '311', 'f', '325', 'y', 'c', 'h', '87']

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

PROBLEM: ['173', 'i', 'w', '425', '27', 'd']

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

PROBLEM: ['159', 'w', '485', 'v', 'f', 'r', '351', '493', '41', 'v', '23', '157']

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