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', '341', '151', '1', '157', '211', '189']
1, 2, 3, 4, 5, 7, 8, 9

['149', 'o', '237', 't', 'k', 'w']
1, 2, 3, 4, 7, 9

['349', '77']

3, 4, 7, 9