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: ['103', '431', 'z', '99', 'h', 'c', 'a', '433', '55', 'k', 'a']

A: 0, 1, 3, 4, 5, 9
****
Q: ['g', '217', 'a', '447', 'f', '329', '281']

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