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: ['475', 's', '123', '389', 'y', 'm', 'v', '47', 'u', '479', '357', '279', '137', 'l', 'i']

A: 1, 2, 3, 4, 5, 7, 8, 9
****
Q: ['421', '99', '115', 'x']

A: 1, 2, 4, 5, 9
****
Q: ['o', '23', '273', 'q', 'r', '311', 'g', 'w', '287', '73', 'w']

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