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: ['71', 't', '93', '301', 'g', '447', '373', 'd', '133', 'r']

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

PROBLEM: ['j', 't']

SOLUTION: -1

PROBLEM: ['83', 'v', '327', 'v', 'l', 'x', '203', 'f']

SOLUTION:
0, 2, 3, 7, 8