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: ['325', '203', 'x', 'r', '189', 't', 'q', '277', '315', 'w', '377', 'g', 'l', '87', 'f']

SOLUTION: 0, 1, 2, 3, 5, 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: ['393', '353']

SOLUTION:
3, 5, 9