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.

['3611', '6825', 'j', 'e', 'r', 'a', '8889', 'y', 'x', 'k', '2651', '4545', '2289', 'r', 'q', '3163', 'a', 'i', 'j', 't', 'b', '2673', '4307', 'q', '5839', 'w', 'g', '6221', 'g', 'h', 'h', '5815', 'n', '3551', '7709', 'z', '2281', '7987', 'w', 'a', '2319', '3337', '3409']
a, b, e, g, h, i, j, k, n, q, r, t, w, x, y, z

['j', '425', '6223', '6631', 'y', '7649', 'r', 'a', '7933', '7947', 'l', 'l', '8755', 'g', 'b', '3351', '49', 'v', 'm', 'x', '3291', '1007', '1401', 'z', 'q', 'a']
a, b, g, j, l, m, q, r, v, x, y, z

['5599', '8855', 'h', 'l', 'i', 'w', '8903', '4829', 'q', '2891', 'd', 'm', 'n', 'z', 'a', '2699', '8405', 'e', '6031', 'b', 't', 'm', '5011', '3507', 's', 'u', 'l', '7257', 'r', '9863', '9785', '5405', '1387', 'c', '8165', '7421', '861', 'e', '7569', 't', 'h', '3161', 'o', 'r', '1873']

a, b, c, d, e, h, i, l, m, n, o, q, r, s, t, u, w, z