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: ['907', '2407', '1385', '3593', 'x', '4143', '2271', '8361', 'q', '5093', 'd', '257', 'm', 'a', '5751', '7845', '3925', '3517', '7753', 'e', '5803', '2629', 't', 'e', '845', '6157', '9787', '225', 'j', 'j', 'l', '1321', 'k', '2459', 'u', '9113', '3193', 'a', 'j', 't']
Example Output: a, d, e, j, k, l, m, q, t, u, x

Example Input: ['h', '1243', '725', 'v', '4201', '5533', 'f', '6775', '6321', '625', '5681', '9859', 't', 'p', '9637', 't', '6019', 'h', '9107', 'j', 'b', 'd', 'r', 'w', 'u', '5001', 'o', '4095', '9193', '3273', 'z', '4619', 'r', '2407', 'j', '1325', '5427', 'v', 'o', 'n', '9311', 'x', '9801', 'u', '1709']
Example Output:
b, d, f, h, j, n, o, p, r, t, u, v, w, x, z