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.

['i', '1191', '5581', '2527', 'g', '9795', '519', 'u', '8389', '9793', 'k', '5733', '7125', '7835', 'j', '855', 'd', 'd', '6555', '3211', 'l', 'o', 'b', '523', 'x', 'j', '1707', '4161', '7171', 'h', 'h', 'm', 'h', '2443', 'e', '649', '951', 'n', 'h']
b, d, e, g, h, i, j, k, l, m, n, o, u, x

['4653', 'e', 'c', 'j', '6739', '3963', 'q', '4649', 'v', 's', 'j', '9757', '8075', '6253', '4365', 's', '9101', 'd', '6989', 't', '5687', '7389', '139', '4029', '5073', 'q', 'e', '2455', '1075', 'j', '1329', 'l', '4689', 't', 'z', '4179', 's', 'l', 'w', 'n', '6569', '8907', 'v', '605', 'y']
c, d, e, j, l, n, q, s, t, v, w, y, z

['r', '8601', '1199', '8123', 'a', '5811', '7425', '4725', 'e', 'n', 'q', 'i', '7643', '4329', 'y', '2387', '1877', 'g', '1457', '7975', 'q', 'x', '6003', '815', 'w', '5767', '3549', 'h', 'c', '7421', 'r', '6503', '6797', '5719', '1263', 'k', 'q', '329']

a, c, e, g, h, i, k, n, q, r, w, x, y