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: ['y', 'x', 'z', '153', '93', 't', '85', '337', '333', 'i', '53', '245', '353', 'm', 'a']

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

PROBLEM: ['45', 'n', 'u', '199', 'y', 'w']

SOLUTION: 1, 4, 5, 9

PROBLEM: ['45', '353', 'f', '201', 'd', 's', 'j', 'e', '39', 'y']

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