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: ['9425', 'l', 'c', 'n', '5925', '2543', '3935', 'c', '7533', 'j', 'q', '3775', '5897', '9435', '69', 'e']
Example Output: c, e, j, l, n, q

Example Input: ['i', '4447', 'g', 'o', 'j', 'p', 'l', 'q', 'o', '8777', 'r', 'v', '961', '6083']
Example Output: g, i, j, l, o, p, q, r, v

Example Input: ['s', 'e', 'g', 'f', 'i', '4281', 'x', 's', '3627', '7535', 'h', '6451', 't', '2295', '737', '1529', '9061', '6627', 'g', '4461', 'l', '8807', '3183', '6373', '227', '6985', '899', '9335', 'g', 'q', '2329', 'e', '4315', '4809', '9009', '8101', '7603']
Example Output:
e, f, g, h, i, l, q, s, t, x