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: ['1649', 'l', 'i', '5901', 'o', 'g', '1197', 'a', '9327', '9835', '1095', 'k', '4489', '9149', 'o', '3095', 'z', 'u', 'y', '561', '7419', 't', 'j', '8763', 'v', '339', 'y', 'w', 'v', 'v', '1867', 'd', 'r', 'w', 'h', 'j', '1531', '3841']
Example Output: a, d, g, h, i, j, k, l, o, r, t, u, v, w, y, z

Example Input: ['2393', 'c', '4413', '5529', '1487', '2499', 'i', 's', 'i', '8575', 'm', 'z', '7179', '6637', '9181', 'z', 'h', '2487', 'i', '3779', '2017', '5217', '5013']
Example Output: c, h, i, m, s, z

Example Input: ['4253', 'z', 'r', '5041', 'j', 'l', '9283', '7023', '3999', 'h', '3361', '7431', 'l', 'd', 'p', '5583', 'e', '869', '5165', 'q', '4729', 'e', '5285', 'e', 't', '9599', '4891', '3607', '7427', '861', '2201', '5085', '5189', '4275', 'm', 'i', '1985']
Example Output:
d, e, h, i, j, l, m, p, q, r, t, z