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: ['1345', 'y', '7221', 'h', 'r', '3255', 'k', 'r', 'j', '8639', '467', 'f', 'k', 'n', 'k', 'j', 'l', 'w', '143', 'w', 'q', '5657', '589']

Output: f, h, j, k, l, n, q, r, w, y


Input: Consider Input: ['2819', 'k', 'u', 'a', '4575', 'a', 't', 'a', 'f', '1507', '415', 'w', 'o', 'o']

Output: a, f, k, o, t, u, w


Input: Consider Input: ['t', 'm', 'n', '7981', 'u', '9305', '3273', 't', '3737', 'i', '2537', '4641', 'q', '5597', 'z', 'p', 'n', 'h', 'j', 'c', 'd', 'k', '7211', '8881', 'x', '771', 'm', 'v', 'g', '2345', 'x', '9305', '9589', '2859']


Output: c, d, g, h, i, j, k, m, n, p, q, t, u, v, x, z