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: ['f', '135', 's', '269', 'x', '45', 'p', '141', 'e']

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

PROBLEM: ['b', '329', 'm', 'q', 'k', 'z', 'k', '199', 'v', 'l']

SOLUTION: 1, 2, 3, 9

PROBLEM: ['415', '287']

SOLUTION:
1, 2, 4, 5, 7, 8