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.
--------
Question: ['149', 'o', '237', 't', 'k', 'w']

Answer: 1, 2, 3, 4, 7, 9


Question: ['167', '229', '439', '389', '483', '207']

Answer: 0, 1, 2, 3, 4, 6, 7, 8, 9


Question: ['277', 'l', '243']

Answer:
2, 3, 4, 7