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: ['y', 'b']

SOLUTION: -1

PROBLEM: ['j', '131', 'e', 'c', '149', '325', 'h', 'l', 'i', 'q', '151']

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

PROBLEM: ['417', '329']

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