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: ['j', '355', 'w', 'f', 'b', '183', '327', '277']

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

PROBLEM: ['r', '495', '383', 'd', '369', '323', 'e', 'c', '149', 'q', '487', 'q', 'c']

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

PROBLEM: ['u', '197']

SOLUTION:
1, 7, 9