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]: ['473', '449', '357', 'p', 'p', 'e', '377', '77']
[EX A]: 3, 4, 5, 7, 9

[EX Q]: ['343', 'c', '7', '271', 'm', '151', 'd', 'n', '305', 'y', 'w', '255']
[EX A]: 0, 1, 2, 3, 4, 5, 7

[EX Q]: ['r', '79', 'b', '355', '7', '47', '217', '307', 'i', 'e', 'b', 'y', 'c', '131', 't']
[EX A]:
0, 1, 2, 3, 4, 5, 7, 9