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]: ['247', 's', 'y', 'c', '421']
[A]: 1, 2, 4, 7


[Q]: ['m', 'e', 'g']
[A]: -1


[Q]: ['q', 'o', 'p', '251', 'c', '459', 't', 'i', 'z', '53', 'u', '335']
[A]:
1, 2, 3, 4, 5, 9