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.

['t', '103', '349', '203', 'b', 'z', 'i', '337', 'y', '137', '77', 'p', 'k']
0, 1, 2, 3, 4, 7, 9

['247', 's', 'y', 'c', '421']
1, 2, 4, 7

['259', '341', 'u', '479', '3']

1, 2, 3, 4, 5, 7, 9