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: ['m', '347', 'o', 'i', 'u', '135', 'e', '179', 'q', '13']

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

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

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

PROBLEM: ['q', 'g', 'z', '309']

SOLUTION:
0, 3, 9