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: ['907', '2407', '1385', '3593', 'x', '4143', '2271', '8361', 'q', '5093', 'd', '257', 'm', 'a', '5751', '7845', '3925', '3517', '7753', 'e', '5803', '2629', 't', 'e', '845', '6157', '9787', '225', 'j', 'j', 'l', '1321', 'k', '2459', 'u', '9113', '3193', 'a', 'j', 't']

A: a, d, e, j, k, l, m, q, t, u, x
****
Q: ['9579', 'm', 'v', 'r']

A: m, r, v
****
Q: ['g', '5671', '3271', '3037', '3233', 'd', 'z', 'c', 'm', '2333', 'r', 'o', '3913', 'z', 'z', '5047', '9161', 'w', '8371', '6187', 'v', 'q', '57', 'a', 'o', '3307', 'f', 'z', '2085', '6741', '55', '9013', 'g']

A:
a, c, d, f, g, m, o, q, r, v, w, z
****