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: ['s', 'y', '133', 'c', '415', 'p']

SOLUTION: 1, 3, 4, 5

PROBLEM: ['469', '13', '333', '271', '223', '341', 'h', '317', '303']

SOLUTION: 0, 1, 2, 3, 4, 6, 7, 9

PROBLEM: ['s', 'v', 'f', 'x', '215', 'a', '81', '339', '117', 'v', 'u', 'v', '241', '487']

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