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.

Input: Consider Input: ['g', '8591', '4463', '2189', '7901', '1457', 'f', 'i', '9031', 'r', '5519', '3955', 'd', '2093', 'c', 'y', '6591', '6463', 'h', '4371', '111', 'p', '3221', '4185', 'p', '8761', 'w', 'p']

Output: c, d, f, g, h, i, p, r, w, y


Input: Consider Input: ['n', 'h', 'j', '5945', '8511', 'y', '7739', '4717', '2483', 'p', '9545', '7647', '9863', '5591', '5393', 'i', '9225', '589', '1497', 'j', 'm', '2397', 'a', 'd']

Output: a, d, h, i, j, m, n, p, y


Input: Consider Input: ['x', 'w', '273', '3421', '3547', '9495', 'c', 'f', 't', 'g', '2241', 'h', 'y', '1951', '6391', 'h', '3553', '9395', '1179', 'y', 'i', '6461', '7931', 'z', '1383']


Output: c, f, g, h, i, t, w, x, y, z