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: ['w', 'o', 'l', '1857', 's', 'q', 'j', 'e', '5945', 'g', 'l', '9563', 'e', 'u', '7633', '7977', '4943', 'y', '5621', 'f', '1653', 'c', 'l', '2843', '2125', '7731', '5257', '5667', 'b', 'b', '5765', 'a', 't', '8163', '9785', '5385']
Example Output: a, b, c, e, f, g, j, l, o, q, s, t, u, w, y

Example Input: ['o', 'z', 'h', '3965', 'n', '3009', '173', '997', '3987', '5799', '2331', 'p', 'x', '897', '8213', '451', 'u', 't', 't', '9917', '4501', 't', 'c', 'i', 'w', 'w', 'u', '2977', 't', 'b', '4161', '9281', 'w', 'f', '3137', '5745', 'e', '673', '6363', 'h', 'q', 'x', 'm', '9505']
Example Output: b, c, e, f, h, i, m, n, o, p, q, t, u, w, x, z

Example Input: ['6039', '3257', '9701', 'w', '8085', 'v', 'y', '1721', '109', 'b', '4707', 'l', 'w', '6115', 'n', '6245', 's', 'p', '5567', 'c', 'h', '5973', 'e', 'b', '821', 'v', '9577', '3219', 'b', '3779', 't', 't', 'm', '6865', '433', '6177', '7573', '3877', 's', '565', '6821', 'x', '2613', '277', '9061']
Example Output:
b, c, e, h, l, m, n, p, s, t, v, w, x, y