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: ['4041', 'l', 'g', '9571', '9295', '1395', 'l', 'p', 'f', 'w', 'g', '1721', '2421', 'w', 'z', '2235', 'p', '7851']
Example Output: f, g, l, p, w, z

Example Input: ['x', 'u', 'm', '8089', '9985', 'e', '2927', 'n', '7085', 'q', 'v', 'f', 'p', '5079', '3339', '7871', 'h', '7389', '733', 'e', '3387', 'b', 'x', 'z', '2039', 'u', '59', '5031', '8115', '5447', '3045', 'x', '6591', '9561', '4315']
Example Output: b, e, f, h, m, n, p, q, u, v, x, z

Example Input: ['4669', 'c', '5055', '9513', '6577', 'y', '5715', '3569', '5847', '5591', '6185', 'g', '1473', '1301', '9715', 'z', 'f', '6205', 'c', 's', 'l', '1389', '4057', 's', 'h', '7293', 'l', '4763', 'p', '1455', '185', 't', '9181', '1585', 'o', '5623', '7323', 'm', 'i', '6375', '2759', 'm', '1881', '9183', '3921']
Example Output:
c, f, g, h, i, l, m, o, p, s, t, y, z