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: ['299', '371', '313', '17', 't', 'q']

SOLUTION: 1, 2, 3, 7, 9

PROBLEM: ['233', '339', '319']

SOLUTION: 1, 2, 3, 9

PROBLEM: ['d', 's', '187', 'w', '233', 'k', 'b', '489', '217']

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