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: ['j', '6675', 'u', 's', '705', '8227', 'f', 'w', 'n']
Example Output: f, j, n, s, u, w

Example Input: ['z', '2519', '4799', '4715', '7165', 'r', 'r', 'l', 'n', '6925', '8935', '9795', '5489', 'v', 'u', '6527', '2241', 'u', 'c', 'w', '9755', 'w', '9823', 'g']
Example Output: c, g, l, n, r, u, v, w, z

Example Input: ['v', 'k']
Example Output:
k, v