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: ['x', 'u', 'm', '8089', '9985', 'e', '2927', 'n', '7085', 'q', 'v', 'f', 'p', '5079', '3339', '7871', 'h', '7389', '733', 'e', '3387', 'b', 'x', 'z', '2039', 'u', '59', '5031', '8115', '5447', '3045', 'x', '6591', '9561', '4315']
Example Output: b, e, f, h, m, n, p, q, u, v, x, z

Example Input: ['135', 'u', '3435', '2985', '9811', 'y', '4309', '9757', '905', 'd', 'g', 'q', '1457', 'l', 'o', 'u', '4517', '2333', '3327', '577', 'a', '4041', '8101', '6211', 'f', 'j', '1721', '7217', 'q', '7443', '8477', '3117', '7779', '9339', '8615', 'm', 'c', 'f', 'c', '8979', '7895', 'k', 'w', '1619']
Example Output: a, c, d, f, g, j, k, l, m, o, q, u, w, y

Example Input: ['8907', '5969', 'g', 'e', 'f', 'i', 'j', 'n', 'n', 'v', '8787', 'x', 'u', 'x', 'y', '3275', '7577', 'q', '6801', '993', 'p', '6403', 's', '6255', 'y', 'a', 's', 'l', '3981', 't', '2005', 'q', '1973', 'i', '4337', '7339']
Example Output:
a, e, f, g, i, j, l, n, p, q, s, t, u, v, x, y