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: ['2633', 'd', 'r', '8083', 'f', 'd', '5121', '8651', 'o', 'b', '811', '7551', 'x', 'p', 'm', 'v', 'm', '7833', '1959', 'y', 'p', '779', '1889']
Example Output: b, d, f, m, o, p, r, v, x, y

Example Input: ['a', '533', '67', 'z', 'z', '9283', 'o', 'a', '7045', '1521', 'm', 'h', 'q', '4173', '7497', '319', '5721', '6097', 'i', '9829', '1801', '7347', 'r', 'z', '239', '4279', 'e', 'k', 'r', 'v', '6653', '599', '8597', 'd', 'r']
Example Output: a, d, e, h, i, k, m, o, q, r, v, z

Example Input: ['5', 's', '6201', '7173', 'z', '2717', 'd', 'i', '3681', 'w', 'l', 't', 'h', 'x', 'c', '7539', '9499', '9773', '319', 'j', 'i', '2819', 'b', '1303', '7837', 'q', 'j']
Example Output:
b, c, d, h, i, j, l, q, s, t, w, x, z