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: ['5', 'y', 'l', '311', '269', 'f', 'm', '25', 'j', 's', 't', '283', 'p']

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

PROBLEM: ['447', '77', '337', 'i', '257', '477', 'l', 'm', '357', 'k', '293', '425', 's']

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

PROBLEM: ['c', 'a', 'l', 'c', '59', 'f', '139', '283', 'v', 'l', 'i']

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