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: ['u', 'i', '1185', '3795', '5417', 'k', 'b', '2629', '2635', 'z']

Output: b, i, k, u, z


Input: Consider Input: ['855', '7603', '7415', '9429', 'g', '6259', '8283', 'l', 'w', '333', 'l', '5947', 'g', 'm', 'k', 'h', 'v', 'u', '367', '619', '5439', '7113', '4011', 'e', '873', 'v', '9447']


Output: e, g, h, k, l, m, u, v, w