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

['49', 'r', '179', 'h', 'q', 'h', 'w', '187', '427', 'x', 'r']
1, 2, 4, 7, 8, 9

['m', 'z', '147', '195', '97', '471']

1, 4, 5, 7, 9