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: ['g', '169', '93', 'z', 'h', '493', 'r']

SOLUTION: 1, 3, 4, 6, 9

PROBLEM: ['d', '351', '357', 'q', 'b', '19', 'r', '231', '381', 'x', 'a', 'y', '263']

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

PROBLEM: ['415', 's', 'f']

SOLUTION:
1, 4, 5