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: ['6599', 'f', 'c', '661', 'q', 'e', '1951', 'f', 'f', 'a', 'd', '9521', '853', 'n', 'w', '6451', '5549', 'k', 't', 'l', 'z', 'm', 'k', '567']
Example Output: a, c, d, e, f, k, l, m, n, q, t, w, z

Example Input: ['5859', 'x', 'z', 'v', 'l', 'z', 'g', 't', 'x', '341', '7023', '4937', 'b', 'n', 'y', 't', 's', '1369', '4461', 'f', '1315', 'l', '5221', '6583', 'h', 'j', 't']
Example Output: b, f, g, h, j, l, n, s, t, v, x, y, z

Example Input: ['4221', 'b', 'j', 'q', '2867', '5953', 'v', 'h', '2891', 'j', '1413', 'f', 'e', 'a', '7837', 'w', 'r', '6557', 'g', 'l', 'm', '1941', '2735', 'f', '6365', '8071', '2581', '9199', '1499', '2995', '7065', 'p', '2495', '7375', 'v', 'x', 'w']
Example Output:
a, b, e, f, g, h, j, l, m, p, q, r, v, w, x