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: ['381', 'l', 'z', '323', 'x', '247', '11']

SOLUTION: 1, 2, 3, 4, 7, 8

PROBLEM: ['171', 'h', '53', 'o', 'q']

SOLUTION: 1, 3, 5, 7

PROBLEM: ['157', 'g', '267', '45', 'l', 'l', '347', '57', '439']

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