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.

Input: Consider Input: ['x', 'o', '8161', 's', '3653', 'v', 'c', 'e', '5353', 'h', '9145', '333', 's', '7689', '8277', 'a', 'o', 'h', 'z', 'w', '9297', 'w', '9383', '8963', 'k', 'x', 's', 'w', 'h', 'j', '5737', 'o', '2247', '3723', '2043', '4615']

Output: a, c, e, h, j, k, o, s, v, w, x, z


Input: Consider Input: ['219', '2065', '4045', 'k', 'n', 's', 'z', '7239', '1043', 'r', '2333', 'q', 'k', 'b', '2013', 'g', '6925', '9835', 'a', '5377', 'k', '8005', 'p', '9753', 'm', '201', '2353', 'f', 'n', '89', 'q', 'p', '7847', 's', 'l', '3359', '2269', 'v', 'm', '8247', '9665', 'u', 'w']

Output: a, b, f, g, k, l, m, n, p, q, r, s, u, v, w, z


Input: Consider Input: ['5495', 'j', '8909', '1627', '8211', '8685', 's', 'f', 'w', '619', '4197', '9279', 's', 'a', 'b', '4193', 'u', 'u', 't', 'u', '7741', '9455', 'r', 'x', '9877', '697']


Output: a, b, f, j, r, s, t, u, w, x