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.

['3223', 'h', 'w', 'f', 'y', '1667', '8843', '8759', '9203', '3305', '3549', '5507', '6251', 't', '8319', '9121', '6643', 'u', '4273', '4429', '7543', '7909', '789', '9183', '5729', 'd', '7063', 'b', '6677', 'w', 'x', 'x', 'z', '769', 'p', 'd', 'h']
b, d, f, h, p, t, u, w, x, y, z

['z', '5601', '5675', 'w', 's', 'z', '9213', '9563', '1699', 'p', 'g', 'm', 'c', '9279', '4481', 'p', 'n', '2389', 'c', '503', '1901', '8827', '1701', '1607', '5633', 'a', 'z', 'g', '3175', 's', 'l', 'l', '6811', '1821', '693', '8277', 'q', '8623', 'o']
a, c, g, l, m, n, o, p, q, s, w, z

['6491', '8953', 'p', 'a', 'r', '9229', '1979', 'b', '1977', 'z', '9927', '7503', '5289', '805', '5763', '2175', 'm', 'b', '2929', '8343', '4181', '7169', '2837', 'r', 'b', 's', '6481', 'h', '3629', '3', 'a', '7435', 'c', 'r', 'b', 'l', '5177', '2303', '6181', '6945', 's', '4483', '1563']

a, b, c, h, l, m, p, r, s, z