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: ['5293', '2211', 'r', 'j', 'x', 'y', 'u', 'n', 'r', 'l', 'v', '113', 'v', 'e', '1323', '6291', 'a', '7417', 'j', '4175', 'd', '855', 'z', '1123']
Example Output: a, d, e, j, l, n, r, u, v, x, y, z

Example Input: ['7155', 'y', '145', '7147', 'u', '8453', 'd', '3693', '6471', '5289', 'n', 'p', '8289', '2929', '199', 'e', '8377', '8937', '5315', 't', 'l', '7715', 'c', 'y', 'f', '9999', 'p', '3655', '5489', 'q', '2321', '9881', '2265', 'n', 'v', '455']
Example Output: c, d, e, f, l, n, p, q, t, u, v, y

Example Input: ['9499', '2083', '5173', 'k', 'f', 'j', 't', 'j', '3915', '337', 'h', 'o', 'h', '5227', '8171', 'm', '5419', '8515', '4053', 'a', 'm', '9537', '4283', 'f', '2839', '5295', '7045', '665', 'z', 'x', '2313', '6115', '6201', '4411', '9639', '4733', '5277']
Example Output:
a, f, h, j, k, m, o, t, x, z