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: ['b', '343', '149', 'h', 'w', 'j', 'd', 'r', '461', 'q', '265', '329', '499', 'r', '291']

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

PROBLEM: ['419', 'v', 'f', '325', '287', '153', 'g', 'o', '29', '463', 'e', '275']

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

PROBLEM: ['x', '191', 'k']

SOLUTION:
1, 9