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.

['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']
a, b, f, g, k, l, m, n, p, q, r, s, u, v, w, z

['8281', '4831', '1329', 'g', 'e', '8879', 'n', 's', 'x', 'j', '6305', 'j', '921', '3677', '5107', 'n', 'j', '9285', 'a', '5329', '6671', 'c', '9283', 'l', 'a', '7907', 'q', '7605', '855', '6477']
a, c, e, g, j, l, n, q, s, x

['5059', '8639', 'c', '209', 'u', '6157', '8219', 'a', 'f', '1371', '6517', '5907', 'n', 'o', '4375', 'q', '2515', '4367', 'n', '5939', 'x', 'k', 's', '929', '9073', '4903', 'd', 'z', 'g', 'z', 'u', '6075', 'y', 'u', 'd', 'i', '9777', '3419', 'h', 'v', 'q', '39']

a, c, d, f, g, h, i, k, n, o, q, s, u, v, x, y, z