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: ['j', '425', '6223', '6631', 'y', '7649', 'r', 'a', '7933', '7947', 'l', 'l', '8755', 'g', 'b', '3351', '49', 'v', 'm', 'x', '3291', '1007', '1401', 'z', 'q', 'a']
Example Output: a, b, g, j, l, m, q, r, v, x, y, z

Example Input: ['d', '2409', '3573', '2045', 'c', 'e', 'l', '3497', '2959', 'k', '3663', '25', '495', 'w', '4925', '3589', '4497', '2359', 'z', '1505', '639', '4019', '4329', '2075', 's', '5069']
Example Output:
c, d, e, k, l, s, w, z