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: ['e', 'n', 'y', 'f', 'l', 'h', '455', 'y', '591', 'm', '9041', 'b', 'b', 'o', '4215', '5009', 'o', 'a', '4369', 'u', '6911', '4825', 't', 'k', '6063', '2939']
Example Output: a, b, e, f, h, k, l, m, n, o, t, u, y

Example Input: ['i', 's', 'f', 'i', '2293', '245', '4983', 'h', 'h', '6203', '8703', '1613', 'h', 'o', '3635', '8069', '2829', '1939', 'u', 'm', '5305', 'n', 'k', '9367', 'u']
Example Output: f, h, i, k, m, n, o, s, u

Example Input: ['b', 'v', 'l', 'e', 't', '8405', '7445', 'c', 'w', 'r', '2057']
Example Output:
b, c, e, l, r, t, v, w