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: ['5293', '2211', 'r', 'j', 'x', 'y', 'u', 'n', 'r', 'l', 'v', '113', 'v', 'e', '1323', '6291', 'a', '7417', 'j', '4175', 'd', '855', 'z', '1123']

Output: a, d, e, j, l, n, r, u, v, x, y, z


Input: Consider Input: ['2453', 'r', 'd', '8499', 't', 's', 'h', 'a', 'm', '9271', 'g', '2599', '6209', 'o', 'i', '4069', 't', '6793', '7679', '6643', '7359', 'm', 'f', 'w', '775', '3347', '6161', '9745', 'i']

Output: a, d, f, g, h, i, m, o, r, s, t, w


Input: Consider Input: ['4507', 'r', '5979', '7349', '4379', '1641', '9339', '1531', '1949', '1641', 'y', 'a', 's', '2147', '2355', '8363', '7033', '4127', 'o', '3719', '5581', 'm', '9271', 's', 'i', '6999', '9811', 'q', '9365']


Output: a, i, m, o, q, r, s, y