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: ['y', 'u', 'c', '5909', 'x', '9865', 'e', 'h', '5125', '4719', 'w', '8855', 'i', 'd']

Output: c, d, e, h, i, u, w, x, y


Input: Consider Input: ['5337', '4877', '9443', '3445', 'u', '2571', 't', 'n', 'x', '1985', '5145', '3397', 'p', '9259', 's', 'x', 'u', 'c', 'g', 't', 'j', '829', '8273', 'e', 'j', 'r', 'x', '865', '4773', 'h', '4407', '8591']

Output: c, e, g, h, j, n, p, r, s, t, u, x


Input: Consider Input: ['f', 'w', 'g', 'w', '4497', 'k', 'e', 'p', '6267', '6765', '6449', 'd', 'c', 'c', '2843', 't', '7603', 'f', 'y', '1249', 'o', 'r', '3677', 'k', '55', 's', '3185', '3475', 'f', 'y', '7285', 'y']


Output: c, d, e, f, g, k, o, p, r, s, t, w, y