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: ['7203', '8715', '3193', 'w', '7159', '8535', 'i', '2425', 'j', 'f', '6709', 'w', 'w', 's', 'e', '9337', 'r', 'r', '5255', '1707', 'u', '1443', 'e', 'e', 'v']

Output: e, f, i, j, r, s, u, v, w


Input: Consider Input: ['3583', 'd', '1481', 'w', 'l', '7261', '2933', 'n', '8725', 'g', '3441', 'r', '287', '7327', '5637', 'r', '5389', 'm', 'j', 'd', 'a', 'e', 'v', '7879', '1731', 'z', '43', 'q', 'p', '4315', 'p', '3651', 'o', 'l', 's', '9787', 'h', '6735']

Output: a, d, e, g, h, j, l, m, n, o, p, q, r, s, v, w, z


Input: Consider Input: ['j', '7617', 'u', 'z', '6871', '4855', '4205', 'h', '7981', '2567', '491', '2163', 'y', 'i', '89', 'k', 'j', 'b', '7419', '1341', 'f', '3971', 'x', 'm', '4063', 't', '3733', '197', '499', 'q', '6951', '631', 'z', 'n', 's', '5263', '2123', 'f', 'f', 'g', '9385', '8537']


Output: b, f, g, h, i, j, k, m, n, q, s, t, u, x, y, z