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: ['u', 'r']

SOLUTION: -1

PROBLEM: ['159', 's', 'z', '85', 't', 'g']

SOLUTION: 1, 5, 8, 9

PROBLEM: ['g', 'i', 'v', 'q', '405', 'x', '101', 'x', 'l', 'q', '315', 'c', 'b', '233']

SOLUTION:
0, 1, 2, 3, 4, 5