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.

['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']
d, f, h, i, j, l, m, q, u, v, x

['5193', 'h', 'm', '703']
h, m

['c', '1067', 'z', '4021', '6675', '2837', '4957', 'w', '9895', '1847', 'v', 'm']

c, m, v, w, z