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: ['l', '7111', 'd', 'e', 'h', 'z', 'x', '5673', 'v', '8255', 'i', 'z', 'c', 'i', '4287', 'q', '9293', '9137', 'p', 'n', 'o', 'n', '7883', '6453', '7355', '8769', 'y', '9153']

Output: c, d, e, h, i, l, n, o, p, q, v, x, y, z


Input: Consider Input: ['x', 'i', 'r', '6011', 't', 'f', 'b', 'i', '8367', '4051', '1459', 'f', '5583', '9609', 'l', 'q', 'g', '8443', 'o', '8697', '7053', '8325', 'k', '7021', 'q', 'm', '6899', '9981', '8985', 'i', 'j', '8043', 'k', '535', '7603', '7629', 'k', '2779', 'g', '2049', 'x', 'd', '8527', 'k', 'q']

Output: b, d, f, g, i, j, k, l, m, o, q, r, t, x


Input: Consider Input: ['4379', 'l', 'x', 'i', 'd', '2625', '5019', '9451', 't', 'r', '715', '883', 'r', 'j', '6487', 't', 'a', 'n', '3101', '6935', 'j', '8521', 'd', 'r', '6845', '2455', '6275', 'i', 'o', 'w', 'e', '2017', 'i', 'x', '8137', 'c', '3589', '9541', '497', 'p', 'k', 'h', 'z', 'e']


Output: a, c, d, e, h, i, j, k, l, n, o, p, r, t, w, x, z