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: ['r', 'j', '437', 'b', '5223', 'n', 'v', '437', 'd', '8285', 'k', 'j', 'r', 'p', 'n', 'e', 'n', 'j', 'o', '2651', 'j', '6365', 'q', 'q', '2159', 'g', '3641', '7727', 'c', '1197', 's', 't', 'n']

A: b, c, d, e, g, j, k, n, o, p, q, r, s, t, v
****
Q: ['7073', 'd', 'e']

A: d, e
****
Q: ['e', 'o', '5453', 'e', 's', '5021', '141', 'c', '3373', '8441', 'j', '6453', 'k', 'a', '2579', '2847', 'm', '7267', '6785', 'u', 'e', 'h', 'v', 'g', 'e', 'm', '2123', '7165', 'c', 'k']

A:
a, c, e, g, h, j, k, m, o, s, u, v
****