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.
Q: ['307', '453', 'h', 'b', 't', 'c', '29', 'y', 'j', '21', 'b', 'e']
A: 
0, 1, 2, 3, 4, 5, 7, 9