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: ['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: ['h', '6865', '4019', '8571', 'y', '5575', '7835', '9537', 'n', '875', 't', 'a', 's', '2769', 'p', '1607', 'n', '4087', '961', '7869', '5085', '2131', '4867', 'j', 'h', 'y', '3105', '6609', 's', 'l', '3399', '5013']
Example Output: a, h, j, l, n, p, s, t, y

Example Input: ['7039', 'p', 'n', 'm', 'j', '1537', '77', '2167', '1835', '7035', 'p', '1891', 'q', 'n', '2297', 'n', 'e', '2453', 'f', '7005', 'q', '4981', '1499', 'r', 'd']
Example Output:
d, e, f, j, m, n, p, q, r