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: ['4993', 'n', '7115', 'f', 'd', 'q', '249', '3203', 'w', '5689', '4103', '7129', '603', 'e', 'z', '5571', '3241', '6029', '2721', '8451', 'o', '7841', 'p', '6271', 'r', 'b', '9481', '4045', 'v']
Example Output: b, d, e, f, n, o, p, q, r, v, w, z

Example Input: ['u', '9249', 'u', 't', 'm', 'm', 'n', 'w', '8617', '2729', 'i', 'l', '2971', '3227', 'b', '9017', '4711', 'i', 't', 'r', 'a', 'a', '1701', '6397', '4535', '9167', '6039', '6111', '849', 'p', '8197', '2645', '5147', 'u', 'l', '7419', 'w', 'w', 'k', 'x', 'c', '3377', '4015', '1297', 'f']
Example Output: a, b, c, f, i, k, l, m, n, p, r, t, u, w, x

Example Input: ['j', '5223', 'g', 'r', 'i', '3575', 'o', 'l', 'g', '209', '2867', '6471', 'y', '4929', 'y', 'x', 'i', '3529', '6319', 'g']
Example Output:
g, i, j, l, o, r, x, y