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: ['r', '495', '383', 'd', '369', '323', 'e', 'c', '149', 'q', '487', 'q', 'c']

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

PROBLEM: ['t', '437', 'o', 'w', 'x', 'e', 'r', 'r', '149', 'd', '391']

SOLUTION: 1, 3, 4, 7, 9

PROBLEM: ['289', '243', 'o', 't', 'm', 'u', 's', 'p', '23', 'k', 'd', 'p', '11', 'c']

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