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]: ['295', 'd', 's', '1', '201', 'n', 'f', '15', '151', '307', 'b', '103', '255']
[EX A]: 0, 1, 2, 3, 5, 7, 9

[EX Q]: ['b', 'q', 'i', '171', 'e', 'x', 't', '335', 'p', '251', '15', 'f', '199', '487', '421']
[EX A]:
1, 2, 3, 4, 5, 7, 8, 9