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: ['l', '7111', 'd', 'e', 'h', 'z', 'x', '5673', 'v', '8255', 'i', 'z', 'c', 'i', '4287', 'q', '9293', '9137', 'p', 'n', 'o', 'n', '7883', '6453', '7355', '8769', 'y', '9153']

Output: c, d, e, h, i, l, n, o, p, q, v, x, y, z


Input: Consider Input: ['575', 'u', 'c', '8113', '2853', '3661', '9427', '3071', '4069', '835', 'w', 't', 'w', 't', 'v', 'g', 'c', '5497', '1703', '8433', 'g', '3545', '2887', 'z', 'a', '2241', '5799', '5915', 'u', '4015', '8327', 'z', 'a', 'w', '8311', '289', '8575', 't', 'b', '2873', 'r', 'z', 'x', '1165', '9881']

Output: a, b, c, g, r, t, u, v, w, x, z


Input: Consider Input: ['i', 'g', 'p', '8707', '8033', 'x', 'w', 'b', 'i', '6231', '4427', '1113', 'b', 'c', '1885', 'q', 't', '5777', 'o', 'x', '41', '2041', '7437', 'r', '5631', '6195', '775', '747', 'q', '3125', 'v', 'w', '7209', 'b', 'w', '9571', 'l']


Output: b, c, g, i, l, o, p, q, r, t, v, w, x