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: ['1487', '8003', 'd', '7237', 'l', 'y', '2749', 'e', '9685', '2825', 'z', '7743', 'r', '9617', 'w', '4323', '2173', '8419', '2831', '8923', 'l', '2985', '303', 'y', '9409', 'i', 'h', 'e']

Output: d, e, h, i, l, r, w, y, z


Input: Consider Input: ['s', 's', '3619', '6051', 'h', '213', '3937', 'v', 'p', 'y', '8449', '9337', '5327', 'a', 'a', 'w', '3985', 'n', 'm']

Output: a, h, m, n, p, s, v, w, y


Input: Consider Input: ['w', '2875', 'q', 't', 'h', 'l', '4465', '7227', 'y', 'd', 'f', '7509', '8979', '4217', 'y', '9065', 'f', '2853', '5715']


Output: d, f, h, l, q, t, w, y