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: ['p', 'f', 'h', '1977', '6221', 'i', 'a', 'l', '5225', '8059', 'c', 'w']
Example Output: a, c, f, h, i, l, p, w

Example Input: ['4417', 'x', '4641', '885', '8485', 'd', '7057', '8519', 'm', 'i', 'l', '4627', '3069', 'v', '5011', 'u', '6673', 'h', '4541', 'j', '2337', '8175', '4797', 'f', '9109', 'q', 'q']
Example Output: d, f, h, i, j, l, m, q, u, v, x

Example Input: ['4723', 'j', '1457', '3807', 'h', 'v', 'h', 'h', '4261', 'p', '7185', '9389', 'p', 'a', '1545', '5193', 'z', 'z', 'u', 'i', 'v', '7767', 'c', '2771', '3639', 'm', 'm', '549', '9467', 'o', 's', 'g', '8727']
Example Output:
a, c, g, h, i, j, m, o, p, s, u, v, z