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]: ['o', 'k', 'i']
[A]: -1


[Q]: ['469', 'y', 'j', 'u', '475', 'k', 'k']
[A]: 4, 5, 6, 7, 9


[Q]: ['b', 'm', '471']
[A]:
1, 4, 7