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: ['z', 'l', 's', 'f', 'j', 'x', '1125', 'd', '37', '5009', '9187', 'b', '8683', '8841', 'y', '9955', '1571', 'm', '347', '3679', '5797', '2133', 'g', 'u', '9817', '6347', '2067', '1927', '167', '4215', '45', 't', 'd', '6599', '4751', 'g', 'l', 'u', '7881', 's']

Output: b, d, f, g, j, l, m, s, t, u, x, y, z


Input: Consider Input: ['4653', 'e', 'c', 'j', '6739', '3963', 'q', '4649', 'v', 's', 'j', '9757', '8075', '6253', '4365', 's', '9101', 'd', '6989', 't', '5687', '7389', '139', '4029', '5073', 'q', 'e', '2455', '1075', 'j', '1329', 'l', '4689', 't', 'z', '4179', 's', 'l', 'w', 'n', '6569', '8907', 'v', '605', 'y']

Output: c, d, e, j, l, n, q, s, t, v, w, y, z


Input: Consider Input: ['1087', 'z', 'k', 'z', '5833', 'f', 'e', '463', '2851', '7117', 'j', '2027', '4147', '9591', '6595', 'f', 'd', '7769', 'u', '1007', '6169', 'd', 'b', 'u', '4539', '4197', '9217', '8709', '5365', '4653', 'n', 'h', 'e', 'x', '3933', 'y', '9669', 'y', '6221', 'r', '2509', '4729', '6925']


Output: b, d, e, f, h, j, k, n, r, u, x, y, z