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]: ['565', 'i', '615', '3047', 'm', '195', '7547', '3003', '9213', '9063', 'c', '5099', 'v', '5003', '9053']
[A]: c, i, m, v


[Q]: ['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']
[A]: a, c, e, f, h, i, l, t, v, w, y, z


[Q]: ['g', 'h', '9003', '2949', 'q', 't', '8383', '315', '7881', 'f', 'q', '9025', '2643', 'x', '2131', 's', 'l', 'z', '1303', '1815', '5947', '5193']
[A]:
f, g, h, l, q, s, t, x, z