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.

['h', 'v', '1263', 'y', '3299', 'd', 'a', 'h', 's', '2007', '7597', '1015', 'k', '6643', '6959', 'g', 'u', 'd', '5737', 'n', 'z', 'y', 'b', 'g', '9059', '7349', 'j', 'w', 'i', 'z', 'p', '5809', 'x', '4421', 'g', '6399', '3965']
a, b, d, g, h, i, j, k, n, p, s, u, v, w, x, y, z

['j', 'y', '9907', 'a', '5715', 'l', '9817', '1949', '2697', '2255', '9571', '8957', '9329', '6055', 'z', 'q', '1185', '4593']
a, j, l, q, y, z

['5735', 'd', 'n', '7319', 'm', 'd', 'j', 'z', 'i', '1953', '9305', '711', 'q', 'o', '6279', '6875', '3893', '7337', '6983', 'q', 'h', 'y', '3375', 'q', '4057', '4845', 'k']

d, h, i, j, k, m, n, o, q, y, z