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.

['425', 'a', '351', 'v']
1, 2, 3, 4, 5

['k', '153', '13']
1, 3, 5

['w', '93', 'r', '295', '297', '439', 'z', 't', '95', '471', '435', 'o']

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