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]: ['3127', '9253', '5667', '9453']
[A]: -1


[Q]: ['k', 'j', 'v', '5277', '8607', 'n', '1109', 'e', 'k', '6579', 'o', '2909', 'u', 't', '9685', '8443', '9257', '8071', 'y', 'b', 'h', '4767', 'a', 'j', '8455', 'b', '7733', '2553', 'e']
[A]: a, b, e, h, j, k, n, o, t, u, v, y


[Q]: ['4967', 'g', 'v', 'f', 'x', 'w', '7713', '2283', 'l', 'i', 'n', '4151', '8365', 'h', 'j', '7301', '8509', '8151', '8761', '3381', '8463', 'b', '6481', 'z', 'y', '609', 'i', 'd', '5243', '5289', 'l', '89', '4777', '7427', 'a', '8861', 'o', '9693', 'j', '1579', 't', '1385', '2037']
[A]:
a, b, d, f, g, h, i, j, l, n, o, t, v, w, x, y, z