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: ['m', 'z', 'd', '4667', 'v', '2881', '887', 's', '9861', 'd', '8821', '125', 't', '4493', '6749', '2983', '309', '6033', 'i', '3421', 'j', '4001']
Example Output: d, i, j, m, s, t, v, z

Example Input: ['p', '6123', '6961', 't', 'p', 'h', '9035', 'r', '6341', 'x', '3635', '5885', 't', '3543', '9567', '1787', 'o', '2991', 'k', '3441', '4091', 'a', 'r', '423', '9383', '7147', 'h', '663', 'd']
Example Output: a, d, h, k, o, p, r, t, x

Example Input: ['3287', '6069', 'p', 'm', 'l', 'f', '4381', 'z', '1843', 'a', 'w', 's', '7401', 'i', '4377', '3193', '7885', 'e', 'w', 'y', 'd', '111', 's', 'u', 'b', '2247', 'l', 'b', '9135', '7919', '5991', '185', 'f', '9711', '5145', '6269', '4253', '7079']
Example Output:
a, b, d, e, f, i, l, m, p, s, u, w, y, z