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: ['469', '65', '111', '135', '209', 'g', '407', 'd', 'r', '325']

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

PROBLEM: ['353', '195', '297', '175', 'u', 'p', 'r', 'l']

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

PROBLEM: ['485', '173', 'a', 'g', 'f', '229', 'v', '61', 'g', '231']

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