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.

Example Input: ['d', 'm', 'k', '3513', '8241', '5541', 'm', 's', '1993', '6163', '2753', 'd', 'b', 'm', 'i', '7647', '8631', '9119', '2165', 'x', '3911', '2769', '1673', '7195', 't', 'w', '5555', 'o', '3265']
Example Output: b, d, i, k, m, o, s, t, w, x

Example Input: ['u', 'i', '1185', '3795', '5417', 'k', 'b', '2629', '2635', 'z']
Example Output: b, i, k, u, z

Example Input: ['f', '2243', '4203', 'k', 'd', 'l', '1375', '2689', 'k', 'q', 'l', 'g', 'j', '3257', 'f', '7737', '7677', 'f']
Example Output:
d, f, g, j, k, l, q