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: ['1345', 'y', '7221', 'h', 'r', '3255', 'k', 'r', 'j', '8639', '467', 'f', 'k', 'n', 'k', 'j', 'l', 'w', '143', 'w', 'q', '5657', '589']

Output: f, h, j, k, l, n, q, r, w, y

Input: Consider Input: ['9555', '5983', '1853', 'c', 'z', 't', 'p', '9041', 'd', '5919', '1621', '345', 's', '2647', '4261', '8611', 'w', 'x', 'p', '9103', '2599', '5101', '9261', 'k', '7437']

Output: c, d, k, p, s, t, w, x, z

Input: Consider Input: ['2361', '8087', '9517', 'f', '1325', '7887', '5361', '2637', '2879', '1531', 'h', '7601', '2081', '3679', 't', 'v', 'd', '9367', 'e', 'i', 'y', '6999', 'o', '7951', 'w', '8827', '3531', '5845', 'g', '55', '1613', 'x', 'z', '9975', '1503', '8191', '3767', '1651', 'p', 'f', '7967', '379', '7699', '6637', '9859']
Output: d, e, f, g, h, i, o, p, t, v, w, x, y, z