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]: ['n', 'h', 'h', 'e', 'p', '1265', '4853', '9433', '1227', '1619', '6381', 'o', '8285', 'k', 'u', '7471', 'm', '6887', '6579', '5813', '5563', '8535', 'n', '3743', 'h', 't', '4497', '2791', 'e', 'v', '6769', '7969', 'x', 't', 'x', 'q']
[A]: e, h, k, m, n, o, p, q, t, u, v, x


[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]: ['6003', 'g', 'l', 'y', 'q', '5867', 'g', 'e', 'o', '8911', 'w', '5249', '7167', 'm', '4983', '8701', '1225', 'q']
[A]:
e, g, l, m, o, q, w, y