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]: ['451', '465', '461', '361', 'i', '379', '271', '103', '15', '419', '329', 'g', 'j', '171']
[EX A]: 0, 1, 2, 3, 4, 5, 6, 7, 9

[EX Q]: ['j', '131', 'e', 'c', '149', '325', 'h', 'l', 'i', 'q', '151']
[EX A]: 1, 2, 3, 4, 5, 9

[EX Q]: ['s', 'w', '209', '41', 'b', '97', '311', 'e', '379', 'e', 'u', 'h']
[EX A]:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
0, 1, 2, 3, 4, 7, 9

