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.

Input: Consider Input: ['q', 'h', 'q', '7185', 'f', 'l', 'r', '3605', 'x', 'i', 'v', '8789', 'u', 'x', 'x', '8315', 'x', 't', 'h', 'o', '4943', '5827', '7677']

Output: f, h, i, l, o, q, r, t, u, v, x


Input: Consider 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']

Output: b, d, e, f, n, o, p, q, r, v, w, z


Input: Consider Input: ['6693', '5355', 'w', '151', '9637', 'y', '4935', '7519', '2965', '4137', '4289', '717', '7367', 'f', 'h', '9223', 'u', '8333', 'j', '7501', 'd', '4407', '651', '7745', 'y', 'i', '2993', '8521', '2101']


Output: d, f, h, i, j, u, w, y