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: ['381', 'l', 'z', '323', 'x', '247', '11']

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

PROBLEM: ['s', '391', 'z', '67', '371', '195', '77', '373', 'g', '249', 'm']

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

PROBLEM: ['391', '39', 'b', 'g', '263', '265', 'q']

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