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: ['9', '129', '467', '59', 'm', 'n', 'd', '107']

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

PROBLEM: ['g', '185', '73', 'h', '455', '333', 'l', '403', 'k', 'e', '77', '429', '423', '453']

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

PROBLEM: ['f', '183', 'd', '71', 'h', '397', 'd', 'z', 'u', '381', '83', 'l', '165', 'z']

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