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: ['2705', 'n', 'r', '8259', '6839', '3239', 'w', 'z', '2611', '2957', '2303', '6315', '7801', 'c', 'w', 'm', '5049', '6465', '599', 'h', 'q', '7559', 'n', '9917', 'v', 'l', '643', '6415', '3587', 'c', '917', '4435', 'p', 'a', '317']

Output: a, c, h, l, m, n, p, q, r, v, w, z

Input: Consider Input: ['4925', '9943', '7935', '4387', '2449', '5797', 'i', '1517', 'w', 'e', '9525', 'y', 't', 'e', '2793', 'v', '9897', '8709', '7247', 'o', 'f', '5549', 'q']

Output: e, f, i, o, q, t, v, w, y

Input: Consider Input: ['v', 'w', 'y', 'o', 'h', '3787', 'g', 'q', 'r', 'm', '5895', '4825', '143', '4039', '3779', 'n', '3281', '7109', '7997', '7081', 'y', '649', '6951', '5679', 'k', 'z', '8281', 'k', '19', '7415', 'c', '7337', 'q', 'm', 'l', '7811']
Output: c, g, h, k, l, m, n, o, q, r, v, w, y, z