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.

['43', '479', '317', 'w', '475', '255', '3', 'x']
1, 2, 3, 4, 5, 7, 9

['377', 'z', '421', '137', 't', 'v', 's', 'l']
1, 2, 3, 4, 7

['249', 'g', 'v', 'o', '377', '131', '141', 'o', 'q', 'h']

1, 2, 3, 4, 7, 9