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: ['201', 'm', '157', 's', 'n', 'i', '325', 'x', '247', 'u', '187', 'e', '199']

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

PROBLEM: ['y', '101', 'g', 'c', 'z']

SOLUTION: 0, 1

PROBLEM: ['w', 'i', 'j', 'k', 't', 'x', 'x', '423', '239', '365', '257', '311', 'j']

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