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: ['g', 'j', '239', 'w', 'q', 'm', 'a', 'l', 'n', 'p', 'i', 'r']

SOLUTION: 2, 3, 9

PROBLEM: ['165', 'k', 'a', 'v', 'u', '61', '327']

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

PROBLEM: ['253', '103', '123', 'h', 'b', 'n', '75', '197', 'p', 'd']

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