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.

['n', 'h', 'h', 'e', 'p', '1265', '4853', '9433', '1227', '1619', '6381', 'o', '8285', 'k', 'u', '7471', 'm', '6887', '6579', '5813', '5563', '8535', 'n', '3743', 'h', 't', '4497', '2791', 'e', 'v', '6769', '7969', 'x', 't', 'x', 'q']
e, h, k, m, n, o, p, q, t, u, v, x

['6175', '9441', '7127', '5979', 's', '1367', 'e', 'm', '7083', '1787', '8375', '2851', '3475', 'r', '697', 'g', 'z', 'm', '4207', 'c', '7971', 'z', '9339', 'd', 's', '3507', '9003', 'i', 'y', 'w', 'j', 'i']
c, d, e, g, i, j, m, r, s, w, y, z

['s', 'v', 'k', '637', 'b', 'j', 'h', '5245', 'p', '3271', 'c', '2085', 'w', 'x', 'l', '8921', '5891', 'i', 'v', '313', 'z', 'u', '4961', 's', 'u', 'u', '9671', '2227', '5415', '4297', '8283', 'q', 'q', '7221', 'f']

b, c, f, h, i, j, k, l, p, q, s, u, v, w, x, z