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', '291', '145', 'd', 'z', '355', 'r']

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

PROBLEM: ['o', 'k', 'i']

SOLUTION: -1

PROBLEM: ['431', 'a', 'f', 'x', 'k', 's', 't', 'a', 'l']

SOLUTION:
1, 3, 4