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: ['71', 't', '267', 'x', 'l', '95', '439', '51', 'i', '497', '469', 'k', '341', 'y']

A: 1, 2, 3, 4, 5, 6, 7, 9
****
Q: ['469', '13', '333', '271', '223', '341', 'h', '317', '303']

A: 0, 1, 2, 3, 4, 6, 7, 9
****
Q: ['75', '7', '219', 'h', 'm', '137', 'n', '399', 's', '305', '61', 'h', '421', 'k']

A:
0, 1, 2, 3, 4, 5, 6, 7, 9
****