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]: ['z', '2519', '4799', '4715', '7165', 'r', 'r', 'l', 'n', '6925', '8935', '9795', '5489', 'v', 'u', '6527', '2241', 'u', 'c', 'w', '9755', 'w', '9823', 'g']
[A]: c, g, l, n, r, u, v, w, z


[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']
[A]: b, d, f, h, p, t, u, w, x, y, z


[Q]: ['o', 'y', 'x', 'c', '6825', 'f', '2087', '7051', 'c', '9091', 'l', '5873', 'w', '8693', '1977', '697', '6463', 'd', 'v', '2007', 'f', 'r', 'l']
[A]:
c, d, f, l, o, r, v, w, x, y