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: ['t', 'c', 'r', '4459', 'o', '1407', 'x', '1515', '331', 'm', '1535', 'p', 'u', 'g', '2513', 'o', '7827', '8149', 'd', 'z', 'q', '5655', 'x', '9997', '2809', 'g', 'h', '6309', 'a', 'j', '9773', '2115', 't', '9113', 'q', 'o', '427', 's', '3815', '5423', 's', 'n', 'i', 'o', '3643']
Example Output: a, c, d, g, h, i, j, m, n, o, p, q, r, s, t, u, x, z

Example Input: ['h', 'g', 'j', 'i', 'y', '7799', 'y', 'e', 'y', 'e', '6757', '3349', '1213', '191', 'd', '2149', '849', '8325', 'b', '6087', 'w', '7211', '7801']
Example Output: b, d, e, g, h, i, j, w, y

Example Input: ['i', '3509', '615', 'h', '9603', '5687', 'r', '7245', '8705', '5329', '2391', 'c', '4269', 'c', '4495', '1677', '7093', 'l']
Example Output:
c, h, i, l, r