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.

['f', 'w', 'y', 't', '5269', '9989', 'p', 'v', '6609', 'v', 'c', 'q', 'm', '6565', '189', 'm', '3617', 'b', '9147', '665', 'v', '5989', '1511', '3123', '6667', '4661', '185', 'b', '3405', 'b', '6027', 'n', '6973', '505', 'g', '815', '3439', '2069', '291', 'j', 'f', '1121', '8009', 'm', '8353']
b, c, f, g, j, m, n, p, q, t, v, w, y

['7595', '5303', '3985', 'n', 'w', 's', 'r', 'f', '8237', 'q', 'y', 'f', '3121', '2463', '4597', 'q', '6801', 'f', 'i', '8563', '3267', 'k', '6157', 'f']
f, i, k, n, q, r, s, w, y

['8565', 'z', '5841', '5487', 'g', 'n', 'f', '6333', '847', 'f', '9317', '2285', 'x', 'h', 'v', 'p', 'g', '3105', '8243', 'c', 'w', '8077', 'x', 'y', 'u', 'p']

c, f, g, h, n, p, u, v, w, x, y, z