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: ['8319', 'f', 'w', 'w', 'v', '6521', '4503', 'b', 's', 'b', '9651', 'k', '4635', '2195', '7537', '6839', 'i', 'd', 'b', '205', 'q', '7333', 'q', '5129', '4921', 's']
Example Output: b, d, f, i, k, q, s, v, w

Example Input: ['z', 'm', 'n', 'u', '9159', '7931', '5401', '1383', '8195', 't', 'x', 'q', 'r', '2535', 's', 'j', 'c', '8123', '2429', '5581', 'k', 'c', 't', 'i', 'm', 'o', 't', 'q', '4819', 't', '1649', 'r', 'y', 'z', '8813', '7451', '199', 'o', 'x', 's', 's', '6747']
Example Output: c, i, j, k, m, n, o, q, r, s, t, u, x, y, z

Example Input: ['o', 'n', '7947', '9951', '2775', '9407', 'm', 'l', 'r', '1417', '265', 'a', 'p', 'n', '9913', '1957', 'm', 'j', '9061', 'v', '7185', '8513', 'l', '3561', 'q', 'i', 'e', 'r', '7605', '4567', 'h', 'p', 'i', 'l', '9157']
Example Output:
a, e, h, i, j, l, m, n, o, p, q, r, v