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]: ['3611', '6825', 'j', 'e', 'r', 'a', '8889', 'y', 'x', 'k', '2651', '4545', '2289', 'r', 'q', '3163', 'a', 'i', 'j', 't', 'b', '2673', '4307', 'q', '5839', 'w', 'g', '6221', 'g', 'h', 'h', '5815', 'n', '3551', '7709', 'z', '2281', '7987', 'w', 'a', '2319', '3337', '3409']
[A]: a, b, e, g, h, i, j, k, n, q, r, t, w, x, y, z

[Q]: ['2633', 'd', 'r', '8083', 'f', 'd', '5121', '8651', 'o', 'b', '811', '7551', 'x', 'p', 'm', 'v', 'm', '7833', '1959', 'y', 'p', '779', '1889']
[A]: b, d, f, m, o, p, r, v, x, y

[Q]: ['8309', '1305', '319', '5609', 'r', '8983', '439', '3753', '7361', 'b', 's', 'n', '9959', 'r', '6373', 'r', '9743', '5915', 'a', '531', '551', 'j', '5339', 'f', '4237', '8267', '9215', '5407', '1323', 'r', '7111', '3975', '4861', '1527', 'r', 'i']
[A]:
a, b, f, i, j, n, r, s