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.

['u', 'z', 'p', '99', 'b']
9

['25', 'b', '455', 'n', '305', '271']
0, 1, 2, 3, 4, 5, 7

['u', 'h', '209', '439', 'm', '459', '289', 's', '45', 't', 'w']

0, 2, 3, 4, 5, 8, 9