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.

['r', '273', 'h', '421', 'k', 'r', 'k', 't', 'x', 's', 'j']
1, 2, 3, 4, 7

['n', 'g', 'd']
-1

['h', '61', '443']

1, 3, 4, 6