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.

[EX Q]: ['3019', 'g', 'q', 'u', '611', 'z', '3671', '8119', '1679', 'h', '2631', '655', 'k', '2837', 'e', 'f', 'e', 'f']
[EX A]: e, f, g, h, k, q, u, z

[EX 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']
[EX A]: b, c, d, e, i, o, p, q, r, u, w, y

[EX Q]: ['6113', '5213', '5473', '2057', '8085', '1827', '5331', 'x', '6019', 't', 'u', '7389', '1069', '4181', 'u', '397', 'n', 'm', '5919', '5651', 'd', 'g', 'm', 'p']
[EX A]:
d, g, m, n, p, t, u, x