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: ['175', 'c', 'c']

A: 1, 5, 7
****
Q: ['25', 'b', '455', 'n', '305', '271']

A: 0, 1, 2, 3, 4, 5, 7
****
Q: ['425', '447', 'u', 'j', '391', '279', 'z', '51', 'r', 'l']

A:
1, 2, 3, 4, 5, 7, 9
****