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: ['v', '3765', '4065', 'a', '4201', 'f', 'x', '9275', 'q', '9303']
Example Output: a, f, q, v, x

Example Input: ['e', '1251', 'y', '6689', '6389', 'h', 't', '503', '5093', 'e', '923', '7051', 'm', 'u', '4501', '3289', '6887', '8341', 'o', '3671', 'n', 'w', '7749', 's', 'j', 'o', '8429', 'q', 'v', 'p', 'd', 'g', 'i', 'f']
Example Output: d, e, f, g, h, i, j, m, n, o, p, q, s, t, u, v, w, y

Example Input: ['9133', '4301', '6677', 'm', 'd', 'c', 'l', '9109', 'u', 'q', '1867', 'v', 'w', 'w', '453', '6327', '6875', 'z', 'e', 'd', 'f', 'e', '8269', '4041', 'b', 'p', 'n', 'b', '5581', 'v', '5619', '9543', '1089', 'e', '65', 's', '6621', '2417', '2561', 'q', 'u', '6605', '9815', 'p', '3233']
Example Output:
b, c, d, e, f, l, m, n, p, q, s, u, v, w, z