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: ['2047', '4403', 'g', '3017', '1627', 'v', 'r', '2237', '5513', 'o', 'v', '7229', '9801', 'j', '443', 'z', 'q', 'y', '7447', '1659', '3411', '55', '5153', '9921', '2195', '1075', '8187', 'p', 'x', 'h', 'y', 't', 'a', 'r', 'f']
Example Output: a, f, g, h, j, o, p, q, r, t, v, x, y, z

Example Input: ['d', 'p', 'q', '5319', 'w', '4887', '6695', 't', '7711', 'l', '7597', 's', 'n', '1461', 'e', '9045', '1307', 'j']
Example Output: d, e, j, l, n, p, q, s, t, w

Example Input: ['3633', 'a', '3027', 's', 'i', '6799', 'h', '7311', 'b', 'w', '6101', '1031', 'l', 'l', '3775', '1317', '2651', 'm', 'p', '3135', '6637', '9553', '7791', 'x', 'l', 'x', '4769', '2289', '6277', '6719', 'x', 's', 'v', '9375', 's', 'y', 'p', '5541', 'r', 'h', '6677', 'm', '5333', '5083']
Example Output:
a, b, h, i, l, m, p, r, s, v, w, x, y