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.

[EX Q]: ['3223', 'h', 'w', 'f', 'y', '1667', '8843', '8759', '9203', '3305', '3549', '5507', '6251', 't', '8319', '9121', '6643', 'u', '4273', '4429', '7543', '7909', '789', '9183', '5729', 'd', '7063', 'b', '6677', 'w', 'x', 'x', 'z', '769', 'p', 'd', 'h']
[EX A]: b, d, f, h, p, t, u, w, x, y, z

[EX Q]: ['u', '8229', '2731', '6595', '4675', 'n', 'a', '7361', '7401', '7273', 'b', '279', '5539', '7919', 'j', 'x', '9521', '8837', '7391', 'h', 'x', 'h', '7283', 't', '3769', '2317', '9131', 'h', 'y', 'c', '1625', 'm', 'e', 'a', '8437', '7543', 'p', '2451', 'k', 'r']
[EX A]: a, b, c, e, h, j, k, m, n, p, r, t, u, x, y

[EX Q]: ['x', 'r', '9447', '8171', '2373', '4835', '839', '4091', '9049', 'z', 'j', '563', '2071', 'z', 'd', '4145', 'v', '7057', '6517', '9793']
[EX A]:
d, j, r, v, x, z