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: ['129', '373', '461', 'h', 'r', '163', '361', '483', '463', 'e', 'z', 'l']

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

PROBLEM: ['149', 'o', '237', 't', 'k', 'w']

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

PROBLEM: ['55', 'm', 'q', '209', 'v', 'g', '123']

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