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: ['341', 'e', 'j', '385', 'o', 'z', 'z', '187', 'm', '73', 'u', '413']

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

PROBLEM: ['t', 'w', '465', '305', 'j', 'm', 'm', 'z']

SOLUTION:
0, 3, 4, 5, 6