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.

['o', '1217', '449', 'n', 'e', 'o', 't', '9043', '1925', '5687', '7197', '7943', 'u', '5053', 'q', 'e', '89', 'l', 'h', '3083', '4295', 'o', 'n', '6309', '743', 'n', 'j', '2105', 's', '6845', 'p', 'p', '1355', '3757', 'v', 'f', '961', '4623', '4633', 'p', '4593', 'p', '7337', 'o', 'u']
e, f, h, j, l, n, o, p, q, s, t, u, v

['5971', 'x', 'c']
c, x

['d', '8139', 'm', '7579', 'v', 'r', 'n', 'z', 'f', '4071', 'i', '5167', 's', '2205', '4235', '139', 'l', 'n', '6047', '7659', 'j', '265', '5313', '9905', 's', '6685', '9771', 'q', '5173', '2473', 's', 'a', 'y', 'r', 'i', '3729', 'r', '7325', '347', '1001', '4141', 'v', 'k']

a, d, f, i, j, k, l, m, n, q, r, s, v, y, z