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: ['101', '473', '25', 'i', '117']

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

PROBLEM: ['439', '443', '175', 'e', 'm', '361', 'd']

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

PROBLEM: ['f', '285', 'x', 'j', 'j', '453', '307', 'j', '323', 't', '357']

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