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

Example Input: ['5181', '8651', '963', '2111', 'g', '7913', '8335', 'o', '1387', '9225', '6517', 's', 'r', '2291', '3699', 'y', 'y', '4223', 'i', '9109', 'm', 's', '8585', 'l']
Example Output: g, i, l, m, o, r, s, y

Example Input: ['5349', '2749', 'o', '7665', 'j', '4879', '8971', 'a', 'p', 'k', 'h', 'd', 'b', '3579', '9721', '4119', 'm', '6381', '8325', '7369', 'p', 'k', 'g', 'b', '7341', '559', '4629', '4007', '8931', '5395', '7357']
Example Output:
a, b, d, g, h, j, k, m, o, p