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: ['243', '125']

SOLUTION: 1, 2, 3, 4, 5

PROBLEM: ['k', 'b', 'k', 'l', '441', 'b', '115', 'd', 'b', 'r', '115', 'k', 'a']

SOLUTION: 1, 4, 5

PROBLEM: ['11', 'p', 'x', 'h', '493', '275']

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