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: ['v', 'j', 'l', 'f', 'n', '185', 'x', '367']

SOLUTION: 1, 3, 5, 6, 7, 8

PROBLEM: ['p', '45', 'z', '85', 'k', 'e', '191', '265', '261', 'w', 'l', '263', 'w']

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

PROBLEM: ['q', '185', '55', '487', 's', 'v']

SOLUTION:
1, 4, 5, 7, 8