Given the task definition and input, reply with output. 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.

['6653', '417', '9109', '4263', 'v', 'x', 'm', '6011', '1603', '3629', '1481', 'z', '1025', '1545', 'r', 'i', '9665', 'l', '1195', '7021', '7901', '1997', 'y', 'v', 'd', '9729', '6593', '1855', 's', 'h', '8025', '239', '7863', '4149', '1363', '4881', '3445', 'g', 'r', '443', 'e', '3373', '4627']

d, e, g, h, i, l, m, r, s, v, x, y, z