In this task, you are given an input list A comprising of numbers and alphabets. You need to extract and sort the unique alphabets in the list. The alphabets in the input list will only be in lowercase. Return -1 if there is no alphabet in the input list.

[Q]: ['7839', '849', '5651', '4275', 'e', '5453', 'h', '2099', '485', 'i', 'm', 'n', '6563', '5675', '4001', 'h', 'm', 'z', '3467', '4237', '5035', '5609', '8475', '5171', 'v', '3883', '8461', '8611', '4853', 'd']
[A]: d, e, h, i, m, n, v, z


[Q]: ['4299', 'b', '4171', '7639', '6609', '927', '5249', 'o', 'p', '9851', 'e', '1311', '3777', '7799', '7687', '8809', 'c', 'r', '47', '1925', '1847', 'r', 'd', 'r', '1871', '5935', 'r', '2283', 'p', 'p', '2727', 'c', 'i', '7357', 'y', '5103', '6115', 'q', 'w', 'u', '9201', '4221', '7717', 'o']
[A]: b, c, d, e, i, o, p, q, r, u, w, y


[Q]: ['i', 'r', '1921', 's', '2015', '8403', 's', '3603', 'y', '5681', 'h', '7239', '1441', 'c', '3501', '3347', '6159', '3345', 'x', '6063', '5829', '4799', '8093', 'q', '1413', 'h']
[A]:
c, h, i, q, r, s, x, y