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: ['87', '353', '329', '163', 'i', 'd', '287']

SOLUTION: 1, 2, 3, 5, 6, 7, 8, 9

PROBLEM: ['105', 'u', '465', 'b', '59', 'd', 'w', 'r', '233', 'v', '197', '189', '329']

SOLUTION: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

PROBLEM: ['g', '271', 'u', '79', 'e', 'h', '395']

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