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: ['61', '417', '437', '489', '383', 'n', '11', 'o', 'a', 'v', '37', 'q', '317']

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

PROBLEM: ['x', '91', 'q', '417', '385', '455', '393', 'm', 's', 'c', '91', '71', 'n']

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

PROBLEM: ['t', 'g']

SOLUTION:
-1