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]: ['d', '5285', 'z', 't', 'i', '719', 'z', 'b', '3603', '4781', 'o', 'g', 'j', 'd', 'r', 'a', 'x', '5829', '4907', '7395', '993', '2109', '1745', '415', '7525', '1029', '7791', '5321', 'h', '6391', 'g', '4613', '9191', 'o', '7365', '1811', '9695', 'w']
[EX A]: a, b, d, g, h, i, j, o, r, t, w, x, z

[EX Q]: ['7595', '5303', '3985', 'n', 'w', 's', 'r', 'f', '8237', 'q', 'y', 'f', '3121', '2463', '4597', 'q', '6801', 'f', 'i', '8563', '3267', 'k', '6157', 'f']
[EX A]: f, i, k, n, q, r, s, w, y

[EX Q]: ['1965', '4567', '7009', '917', '2021', 'l', '3973', '7733', 'z', '7893', '7527', '9135', '6237', '2241', '179', 'f', '9123', 'h', '9489', '3241', '3361', '2779', 'i', '2415', '6053', 'y', 'k']
[EX A]:
f, h, i, k, l, y, z