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.

Q: ['j', 's', 'z', 'v', '5401', 'u', '8859', 'i', 'l', 'a', 'p', 'v', 'v', 'o', '3969', '4091', 'y', '6827', '1799', '5163', 'd', 'w', '4795', '5167', 'x', 'q', '2903', '1171', '5279', '449', '7901', 'u']

A: a, d, i, j, l, o, p, q, s, u, v, w, x, y, z
****
Q: ['p', '3981', 'e', '5949', 'p', '4075', '1919', 'w', 'r', '8059', '4303', 'f', '5201', '2255', '2737', '7395', '8809', 'j', 'z', 'n', '4797']

A: e, f, j, n, p, r, w, z
****
Q: ['2261', '6465', '783', 'm', '3111', '5455', '4415', 'a', 's', 'v', 'h', 'd', 'm', 'h', 'y', 't', 'k', 'h', '877', '8665', '2595', '3065', 'g', '9', 'c']

A:
a, c, d, g, h, k, m, s, t, v, y
****