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: ['v', '105', 'p', 'w', '295', '239', '453']

SOLUTION: 0, 1, 2, 3, 4, 5, 9

PROBLEM: ['323', '243', '385', 'z', '345', 'v', '359', 'e', '215', '417', 'g', '445', '145', '413']

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

PROBLEM: ['i', '459', 'f', 'b', '191', 'v', '469', '75']

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