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.

[EX Q]: ['5293', '2211', 'r', 'j', 'x', 'y', 'u', 'n', 'r', 'l', 'v', '113', 'v', 'e', '1323', '6291', 'a', '7417', 'j', '4175', 'd', '855', 'z', '1123']
[EX A]: a, d, e, j, l, n, r, u, v, x, y, z

[EX Q]: ['r', 't', '3539', 'z', 't', '6055', 'r', '5787', '8469', 'p', 'h', '9729', 'z', '1637', '5873', 'c', '3597', '4411', 's', 'k', 'q', '6471', '5375', 'e', 'v', 'i', '7425', 'h', '9079', 'd', '1585', '6011', 'x', '5669', '5219', '4951', '4765', '8285', '2811', 'c', '1805', '6463']
[EX A]: c, d, e, h, i, k, p, q, r, s, t, v, x, z

[EX Q]: ['6561', 'g', 'b', '7927', '7093', 'o', '597', '2791', '769', 'p', 'j', 't', 'r', '8085', '8905', '583', 'm']
[EX A]:
b, g, j, m, o, p, r, t