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: ['v', 'd', '3805', '8031', '3327', 'c', 'n', '6153', '2705', 'w', '5675', '6543', 'm', 'v', 'y', 'd', '2943', '4423', '515', '4501', 'y', '9377', 'j', 'i', 'f', '4749', 'o', 'r', '2605', 'm', '117', 'o', '9197', 't', 'l', '4145']

Answer: c, d, f, i, j, l, m, n, o, r, t, v, w, y


Question: ['1801', 'q', '5101', '8863', '2309', 'p', '8789', '9529', '6135', '5523', 'f', '8889', '7639', 'k', '263', '5751', '5529', 'g', '1451', '4143', 'e', '6987']

Answer: e, f, g, k, p, q


Question: ['5941', 'e', 'm', '2071', 'z', '5425', 'h', 'g', '5173', '5465', 'e', '9971', '7045', '6379', 'i', 'v', 'w', 'l', '4457']

Answer:
e, g, h, i, l, m, v, w, z