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.

Q: ['499', '493', 'i', '87']

A: 3, 4, 7, 8, 9
****
Q: ['353', '195', '297', '175', 'u', 'p', 'r', 'l']

A: 1, 2, 3, 5, 7, 9
****
Q: ['279', '381', '297', 'f', 'o', '15', 'w', '131', 'n', 'h', '45', '335', 'f', '477']

A:
1, 2, 3, 4, 5, 7, 8, 9
****
