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: ['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: ['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: ['x', '9149', '4823', '2295', 'd', '4519', 't', 'a', 'd', 'q', '9201', 'q', '4131', 't', '1543', '7249', 'k', 'n', '6693', 's', 'k', '6829', 'v', 'x', '1', 'f']
Example Output:
a, d, f, k, n, q, s, t, v, x