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: ['x', 's', '497', '239', '197', '191', '7', 'h', '191', '281', '55', '317', '407', '201', 'v']

SOLUTION: 0, 1, 2, 3, 4, 5, 7, 8, 9

PROBLEM: ['j', 's', '127', 'o', 'e', '227', 'k', 'o']

SOLUTION: 1, 2, 7

PROBLEM: ['e', '5', 'c']

SOLUTION:
5