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: ['1223', 'h', 'a', 'o', 'v', '2535', 'g', '6267', 'w', '9625', '7961', '9577', '7611', '5655', 'p', 'j', 's', '2141', '4101', 'l', '4367', '9383', 'n', '5965', '9097', '7571', 'p', 'u', 'x']

A: a, g, h, j, l, n, o, p, s, u, v, w, x
****
Q: ['7823', '2933', 'k', '4139', '5585', 'f', 'c', 'm', '2035', 'q', 'z', 'l', '1999', 'q', 'p', '7291', '2091', 'v', '423', 'e', 's', '6089', '4763', '6739']

A: c, e, f, k, l, m, p, q, s, v, z
****
Q: ['1425', '6837', '733', 'z', '4753', '7007', '4929', 'k', 'b', '2321', '1725', 'z', '7569', 'p', '4873', 'z', '685', '5325', '4231', '4161', 'h', '9613', '4547', 'd', '4721', '6523', '4355', 't', '1437', 'j', '5983', 'q', 'u', '5567', '1517', 'w', 'c', '6075', 'w']

A:
b, c, d, h, j, k, p, q, t, u, w, z
****