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.

Example Input: ['m', '3809', 'l', 'k', '1929', '7963', 'n', 'u', '2125', 'g', 'o', '8325', 'o', 'h', 'y', '3025', 'e', 'e', 'c', 'x', '8445', '4979', 'z', 'f', '4201', '4765', 'g']
Example Output: c, e, f, g, h, k, l, m, n, o, u, x, y, z

Example Input: ['8451', 'x', '9965', '9303', 'm', 'f', '4205', 'y', 'n', '8521', '9995', 'z', 's', '3519', 'k', 'e', 'o', 'k', '9611', 'q', 'l', 'p', '3339', '4023', 'n', 'd', '8903', 'a', 'k', 'u', '4009', 'e', 'm', '989', '4495']
Example Output: a, d, e, f, k, l, m, n, o, p, q, s, u, x, y, z

Example Input: ['r', '1851', 'p', '2685', 't', '8249', 'w', 'm', '7005', 'n', 'm', '1307', 'f', '8355', '9779', 'r', '8263', 'o', '1685', 'j', '7275', '5229', '6563', 'r', 'y', 'k', '919', '8657', '5287', 'v', 'e', '6261', '8803', 'l', '9651', '5869', 'd', '1663', 'a']
Example Output:
a, d, e, f, j, k, l, m, n, o, p, r, t, v, w, y