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.

Input: Consider Input: ['j', '6675', 'u', 's', '705', '8227', 'f', 'w', 'n']

Output: f, j, n, s, u, w


Input: Consider Input: ['g', '6867', '7965', '3313', 'k', '1827', '7337', 'u', '1209', '5145', 'w', 'h', '9059', 'u', 'b', '3189', '2837', 'k', 'y', 'e', 'b', '4479', '541', '7103', 'h', 'm', '2177', '6377', '3993', '7167', 'q', '2145', '5007', '9135', '5331', 'e']

Output: b, e, g, h, k, m, q, u, w, y


Input: Consider Input: ['o', 'e', 'w', '1847', '545', '3811', '7113', 'g', 'y', 'j', '1065', 'v', 'z', '3451', '1129', '6985', '6785', '3931', '2655', 'w', '3265', '3863', '4217', 'h', '7689', '4835', '5311']


Output: e, g, h, j, o, v, w, y, z