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: ['203', 'p', 'r', 'r', 'c', 'w', 'z', 'w', 'a', '203', 'n']

SOLUTION: 0, 2, 3

PROBLEM: ['299', '371', '313', '17', 't', 'q']

SOLUTION: 1, 2, 3, 7, 9

PROBLEM: ['e', '291']

SOLUTION:
1, 2, 9