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: ['239', '439']

SOLUTION: 2, 3, 4, 9

PROBLEM: ['v', '351', 's', 'f', 'd', '137', '11', '355', '345', 'm', 's', '165', '97', '225']

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

PROBLEM: ['185', '23', '49', 'c', '253', 'c', 'x', 'o', '201', '53']

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