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.

Input: Consider Input: ['o', 'd', '6495', '5211', '341', 'v', '385', 'v', 'g', 'v', 'l', '7631', '2675', 't']

Output: d, g, l, o, t, v


Input: Consider 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']

Output: d, f, h, i, j, l, m, q, u, v, x


Input: Consider Input: ['6255', 't', '349', '5651', 'e', 'd', 'd', '5711', 'r', '5733', '7245', 'w', '3393', '9599', 'q', 'r', 'r', '4081', 'u', '7051', 'h']


Output: d, e, h, q, r, t, u, w