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.
One example: ['q', '31', 'a', 'd', '53', '85', 'p', '77']
Solution is here: 1, 3, 5, 7, 8
Explanation: Here, the numbers in the list are '31', '53', '85' and '77', and the unique digits used in the list are '1, 3, 5, 7, 8' in ascending order.

Now, solve this: ['441', '65', '169', 'l', '61', 'g', '49', '77', '303', '395', '435', 'r', '259', 'v', '299']
Solution:

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, 5, 6, 7, 9