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.
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Question: ['5489', 'f', '6833', 's', 'c', '6575', 'w', '2957', '8465', 'v', 'h', '2119', '7731', 'e', '5367', 'e', '3357', 'p', '7565', 'n', 'x', 'n', 'f', '1075', '5941', '6505', 'j', 'p', '2853', 'l', 'q', '4727', 's']

Answer: c, e, f, h, j, l, n, p, q, s, v, w, x


Question: ['5181', '8651', '963', '2111', 'g', '7913', '8335', 'o', '1387', '9225', '6517', 's', 'r', '2291', '3699', 'y', 'y', '4223', 'i', '9109', 'm', 's', '8585', 'l']

Answer: g, i, l, m, o, r, s, y


Question: ['i', '4827', 'e', '9835', 'e', 'x', 'j', 'f', 'x', 'e', 'j', 'h', '9021', '539', '7903', 'f', '4943', '3549', '9847', '9763', 'm', 'z', '1409', '9461', 'h', '9993', 'q']

Answer:
e, f, h, i, j, m, q, x, z