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]: ['5499', 'm', '327', 'h', '5765', '4231', 'y', 'g', 's', '883', '9843', '2751', '8967', 'z', '2301', 'l', 'l', 'k', '7843', '7221', '3643', 'k', '5951', 'r', '9441', '235', '3835', 'l', 'e', 'y', '4061', 'l', '1177']
[EX A]: e, g, h, k, l, m, r, s, y, z

[EX Q]: ['g', 'h', 'g', 'g', 's', 'h', '2849', '2705', '1185', 'x', '5789', '8221', 'e', 'x', 'g', 'b', '4903', 'q', '1563', 'r', 'k', 't', '9047', 'p', 'p', '9397', 'u', '7473', 'f', 'o', 'y', '1957', '1039', '9905', 'i', '4829', 'q', 'w', 'k', 'p', 't', '563', 'g', 'l']
[EX A]: b, e, f, g, h, i, k, l, o, p, q, r, s, t, u, w, x, y

[EX Q]: ['t', 'l', 'l', '8723', 'g', 'z', '3901', '3759', 'v', '1433', '7019', 'x', '4633', '9887', '569', 'r', '1209', '183', 'd']
[EX A]:
d, g, l, r, t, v, x, z