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.

[EX Q]: ['x', '493', 'x', '211', 'n', '143', '277', '191']
[EX A]: 1, 2, 3, 4, 7, 9

[EX Q]: ['357', 'c', 'f', '3', 'q', 'w', 'm', 'l', '137', 'k']
[EX A]: 1, 3, 5, 7

[EX Q]: ['421', '263', '329', 'b']
[EX A]:
1, 2, 3, 4, 6, 9