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.

['8005', 'q', 'w', 'a', 'f', 'o', '6017', '7591', 'm', 'p', 'z', 'q', 'u', 'o', 'd', '6043', 'f', '3575', 'r', '2885', 'o', '3141', '621', '2375', 't', '5397', 'h', 'b', 'i', '3785', '1551', 'i', '8879', 'g', '5237', '7111', '2057', '1743', '9895', '2613', 'i', 'z', '677']
a, b, d, f, g, h, i, m, o, p, q, r, t, u, w, z

['r', 'y', 'c', '3211', '9245', '8459', '8521', '5781', 'w', 's', 'd', '5299', 'a', 'y', 'g', 'm', '6435', '8605', 'e', 'h', '6871', 's', '387', 'l', '5829', 'e', 'd', '9545', '2945', 'k', 'v', 't', '8449', '2199', 'm', '2599', '1489', '6623', 'x', 'l']
a, c, d, e, g, h, k, l, m, r, s, t, v, w, x, y

['2091', 'x', 'y', 'e', 'r', 'r', 'd', '77', '3177', 'r', '1921', '2371', 's', '9659', '8683', '6819', '3461', 't', 'n', '5459', '6235', 'l', 'u', 'o', '7959', '2967', 'l', 'i', 'l', '6803', '3999', '1475']

d, e, i, l, n, o, r, s, t, u, x, y