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]: ['9351', 'v', 'h', 'z', 'g', 'f', 't', 'q', 'g', 'o', '4073', 'n', '6149', '1735', '157', 'm']
[EX A]: f, g, h, m, n, o, q, t, v, z

[EX Q]: ['d', 'o', '7643', '9065']
[EX A]: d, o

[EX Q]: ['j', 'h', 'f', 't', 'i', '6995', 'j', 'c', '2023', 'z', '1175', 'y', '3753', '1313', 'k', 'k', '567', '7743', '3201', 'v', 'e', '5257', '5407', '6593']
[EX A]:
c, e, f, h, i, j, k, t, v, y, z