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: ['z', 'h', '2065', '6773', 'v', '151', '8957', 't', 'l', 'j', '7867', 'v', '799', '9009', '4317', 'm', '6921', 'r', '1245', '5637', 'x', '4465', 'f', 'y', '3549', 'e', 'f', 'm', 't', '6281', '4241', '3415', 'z', 'g']

Output: e, f, g, h, j, l, m, r, t, v, x, y, z


Input: Consider Input: ['a', 'w', 'm', 'g', 'c', '5475', '7391', 't', '1049', 'p', 'd', '1397', 'k', 'x', 'j', '2525', 'f', '741']

Output: a, c, d, f, g, j, k, m, p, t, w, x


Input: Consider Input: ['8097', 's', 'r', '3593', 'n', '2789', '3723', 'a', '8425', '237', '7783', '3643', 'j', '7757', '2431', 'a', '4519', 'n', 'l', '5273', '6947', '2477', 'y', '5245', '9119', 'f', '6767', 'n', '5375', 'o', 'g', 'y']


Output: a, f, g, j, l, n, o, r, s, y