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.

Q: ['j', '1733', 'p', '6741', '7933', '8943', '733', 'x', '1107', 'z', '1719', '7653', 'y', 'z', '6563', 'p', '4615', 'j', '4489', 'h', 'w', 'y', 'p', 'c', '7949', 'k', 'm', 'r', '9427', '7243', '9777', 'j', '323', '4095', 't']

A: c, h, j, k, m, p, r, t, w, x, y, z
****
Q: ['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']

A: c, d, f, i, j, l, m, n, o, r, t, v, w, y
****
Q: ['m', '7399', 'v', '9881', '6549', '3421', '5261', '3177', '1487', 'w', 'y', 'k', '6225', 'x', '9335', 'r', 'h', '3783', 'l', '2581', '3055', '3997', 't', '3271', '3031', '6835', 'z', '7273', '8845', 'g', 'o', '2289', '9209']

A:
g, h, k, l, m, o, r, t, v, w, x, y, z
****