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.

['71', 't', '267', 'x', 'l', '95', '439', '51', 'i', '497', '469', 'k', '341', 'y']
1, 2, 3, 4, 5, 6, 7, 9

['r', '171', 'p', '299', 'u', 'n', '421', '331', 'h', '21', 'h', 'x', '435', '327', '373']
1, 2, 3, 4, 5, 7, 9

['247', 'e', 'v', '289', 'c', 'b']

2, 4, 7, 8, 9