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: ['u', 'p', '37', '199', '197', 'l', '213', 'k', '303', '459', '155', 'h', '449']
A: 
0, 1, 2, 3, 4, 5, 7, 9