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: ['2775', '7507', 'c', '4417', '3449', 'y', 'z', 'e', 'f', '9515', '8555', '7269', '8353', '4239', '4347', '4479', '8645', '9925', 'o', 'h', 'o', '8641', 'y', '3251', '1191', 't', 'x', 'z', '7203', 'b', 'b', '7545', '7283', 'z', 'y', '8127', 'x', 'l', '6251', 'y']

Output: b, c, e, f, h, l, o, t, x, y, z


Input: Consider Input: ['177', '9073', '7509', 'e', 'n', 'r', 'v', 'l', '8325', 'y', 'a', '9389', '9015', 'o', 'a', 't', 's', 'u', '1163', 'x', '1483', 'u', 'v', '4357', 'x', '9641', 'y', '4399', 'b', 'c', '377', 'e', '6991']


Output: a, b, c, e, l, n, o, r, s, t, u, v, x, y