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: ['4927', 'h', 'x', '4719', 'j', 'f', '7797', 'l', 'i', 'q', 'x', 'i', 'k', '3215', 'k', '1625', 'g', 't', 'i', 'w', 'n', '6659', '8355', '831', 'h', '9723']

Output: f, g, h, i, j, k, l, n, q, t, w, x


Input: Consider Input: ['4423', '8295', 'h', '4881', 'j', 'c', '1185', 'z', 'm', '2725', 'p', '9187', '6275', '1617', '2523', '9879', '4149', '2197', '3909', '5155', '691', 'r', 'e', 'u', 'l', 'd', '1581', '2763', 'c']

Output: c, d, e, h, j, l, m, p, r, u, z


Input: Consider Input: ['g', '8755', '6415', '3673', 's', 'j', 's', '8349', 'q', '7935', 's', '2843', 't', '5251', 'f', '95', '5575', 'o', 's', 'd', '9909', 'q']


Output: d, f, g, j, o, q, s, t