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.

['5489', 'f', '6833', 's', 'c', '6575', 'w', '2957', '8465', 'v', 'h', '2119', '7731', 'e', '5367', 'e', '3357', 'p', '7565', 'n', 'x', 'n', 'f', '1075', '5941', '6505', 'j', 'p', '2853', 'l', 'q', '4727', 's']
c, e, f, h, j, l, n, p, q, s, v, w, x

['e', '8391', '7065', '6141', '3335', 't', 'i', 'c', '1791', '6333', 'b', 'z', '1621', 'e', 'h', 'u', 'o', 'q', '3195', '6507', '3253', 'c', '2067', '3917', '7111', 'r', 'j', 'd', '3987', '9139', 'm', '981', 'l', 'f', '2417', 'w', '9983', 'h', 'd', '6021', 'a', 'f']
a, b, c, d, e, f, h, i, j, l, m, o, q, r, t, u, w, z

['763', '1407', '7737', '655', 'q', '8091', '6043', 'o', '839', '1101', 'v', 'd', '9191', '5533', 'w', '2297', '7953', 'f', '1699', 't', '8921', '9529', '7417', '6519', 'p', '9917', '3397', '3501', '8927', 'o', 'i', '3119', '2501', '9999', '5453', '6341', '541', 'e', '3287', 'k', 'k', 'c', '661', 'p']

c, d, e, f, i, k, o, p, q, t, v, w