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: ['c', '317', 'z', 'z', 'h', '227', '439', 'x', 'f']

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

PROBLEM: ['163', '375', 'e', 'g', '115', '445', 'c', '393', 'm', '59']

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

PROBLEM: ['19', 'j', '175', 'a', 'i', 'b', '321', '427', 'k', 'g', 'v', '485', '425']

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