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: ['z', 'h', '2065', '6773', 'v', '151', '8957', 't', 'l', 'j', '7867', 'v', '799', '9009', '4317', 'm', '6921', 'r', '1245', '5637', 'x', '4465', 'f', 'y', '3549', 'e', 'f', 'm', 't', '6281', '4241', '3415', 'z', 'g']
Example Output: e, f, g, h, j, l, m, r, t, v, x, y, z

Example Input: ['y', 'u', 'c', '5909', 'x', '9865', 'e', 'h', '5125', '4719', 'w', '8855', 'i', 'd']
Example Output: c, d, e, h, i, u, w, x, y

Example Input: ['d', 'b', 'a', 'n', '2739', '1391', 'u', '2553', 'r', 'v', '2397']
Example Output:
a, b, d, n, r, u, v