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: ['2593', '1835', '5089', 'v', '9723', 'f', '9279', '4257', '2175', '655', 'q', 's', 'v', 'j', 'm', '4471', '6419', '1685', '2793', 'x', '509', 's', '4833', '2125', 'b', '6379', '1075']
Example Output: b, f, j, m, q, s, v, x

Example Input: ['6627', '8037', 'q', 'e', 'j', 'p', '9613', '9317', 'm', 'm', '5345', 'f', '8105', '5665', '4175', '4793', '3707', 'i', 'b', '6745', '747', '8329', '1481', 'b', '8949', 'n', '4803', '1359', '3533', 'f', '543', '3003', '6943']
Example Output: b, e, f, i, j, m, n, p, q

Example Input: ['3413', '1197', 'n', 'x', '2711', '6595', 'l', 'k', '9361', '2391', 'y', '3135', 'v', 'b', 'a', '2267', 'o', '5699', '5539', '8533', '9605', '2781']
Example Output:
a, b, k, l, n, o, v, x, y