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: ['n', 'h', 'h', 'e', 'p', '1265', '4853', '9433', '1227', '1619', '6381', 'o', '8285', 'k', 'u', '7471', 'm', '6887', '6579', '5813', '5563', '8535', 'n', '3743', 'h', 't', '4497', '2791', 'e', 'v', '6769', '7969', 'x', 't', 'x', 'q']
Example Output: e, h, k, m, n, o, p, q, t, u, v, x

Example Input: ['5737', 'b', 'e', 't', '7419', 'n', 'y', '5225', '6485', 'b', '1343']
Example Output: b, e, n, t, y

Example Input: ['3945', '2855', 'q', '8107', '4113', '2943', 'k', 'y', '3271', 'r', 'y', '853', '5101', 'n', '8685', 's', '739', 'f', 'j', 'i', '1941', '3855', 's', '7003', '9051', 'r', 'g', '595', 'k', '2353', '2481', '321', 'w', 'i', '8243', '5249', 'k', 'x', '5231']
Example Output:
f, g, i, j, k, n, q, r, s, w, x, y