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]: ['q', '8149', '4087', '5183', 't', 'j', 'e', 'g', 'r', '2125', 'y', 'l', 'g', '3673', 's', 'r', 'e', 'v', '4259', 'v', '3477', '9353', '3639', 'v', 'n', 'e', 'z', '5071', 'x', '6287', 'e', 'e']
[A]: e, g, j, l, n, q, r, s, t, v, x, y, z


[Q]: ['3627', '2051', '3203', 'c', 'r', 'a', '1453', 'e', 'z', 't', '1093', '4651', 'a', 'f', '8159', '9623', 'l', 't', 'r', '6963', '7071', '8103', '3493', 'y', '2369', '609', '2011', 'f', '187', 'f', 'c']
[A]: a, c, e, f, l, r, t, y, z


[Q]: ['5515', '575', 'w', 'm', '8189', '2069', 'f', 'g', '867', 'i', '1265', 'y', 'x', '9071', 'o', '8945', '6149', 'i', '1425']
[A]:
f, g, i, m, o, w, x, y