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.
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Question: ['4417', 'x', '4641', '885', '8485', 'd', '7057', '8519', 'm', 'i', 'l', '4627', '3069', 'v', '5011', 'u', '6673', 'h', '4541', 'j', '2337', '8175', '4797', 'f', '9109', 'q', 'q']

Answer: d, f, h, i, j, l, m, q, u, v, x


Question: ['4993', '6641', '3127', '9409', '8453', '5909', '6109', 'y', 'f', '6859', 'c', '3863', 't', '1221', '3689', 'w', 'h', '7947', 't', '5979', 'l', 'i', '1321', '3149', 'l', 'v', '3825', 'z', '9297', 'f', 'e', '7205', 'a', 'a', '2645', '391', '4965', 'w', 'h', '7715', '9409', '3603', '4147']

Answer: a, c, e, f, h, i, l, t, v, w, y, z


Question: ['5551', 'j', 'y', 'e', '1723', 'z', '6387', '6325', '4033', '4261', '4411', '1169', '9145', 'g', 'l', 'g', 's', 'z', 'o', 'c', '3033', 'x', 'k', 'f', '5495', '6633', '3043', '6905', '2989', 'r', '8545', '2321', '7035', '9321', '6537', 't', 'p', 'h', '7533', '9069', 'e', 'm', '6487', 'e']

Answer:
c, e, f, g, h, j, k, l, m, o, p, r, s, t, x, y, z