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: ['h', 'b', '9601', 'h', 'h', 'h', '8099', '8265', 'i', 'd', '8791', 'p', '8059', '4309', '501', '2581', '9837', '157', '4785', '5925', 'q', '8491', '4779', 'r', 'l', 'k', '3679', 'v', 'g', 'g', '9731', '1909', '9783', 'f', '4293', '5009', 'o', '3057', '3157', 'c', '5587', 'b', 'f', 'd', 'k']

A: b, c, d, f, g, h, i, k, l, o, p, q, r, v
****
Q: ['7301', '7999', 'x', 'r', '6881', 'e', '609', 's', '7495', 'a', 's', '1961', 'q', 'x', '373', '6289', '4847', '5969', 't', '5487', '7639', '9039', '2395', 'b', 'd', '1447', 's', '8137', 's', '443', 'f', 'z', '4823', 'k', 'i', 'o', '4739', 'w', 'f', '8853', 'a']

A: a, b, d, e, f, i, k, o, q, r, s, t, w, x, z
****
Q: ['i', 'd', 'w', '8399', 'v', 'c', 'l', 'z', '1725', 'q', 'y', '7727', 'z', 'i', '6541', 'v', '9693', 'x', 'q', '57', 'n', 'w', 'w', 't', '7899', 'n', 's', 'd', '2323', '6689', '6077', '1367', 'f']

A:
c, d, f, i, l, n, q, s, t, v, w, x, y, z
****