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.

['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

['d', '6003', 'k', '1987', '1877', 'a', '2615', 'n', 's', 'f', 'b', 'm', '1149', '8293', '5803', 'e', '2697', '5917', 'p', '6035', '2385', 'i', 'u', 'm', '9565', '4523', 'b', 'v', '2577', '9725', '6093', '6203', '4197', '8477', 'o', 'd', '3637', '9827', '5523', '7189', 'j', '8893', 'h', 'q']
a, b, d, e, f, h, i, j, k, m, n, o, p, q, s, u, v

['i', 'e', '5669', '7745', 'k', '455', 'q', 'l', '6783', '2657', 'l', 'l', 'w', 'b', '8571', 't', 'e', 'v', 'v', 'h', '7001', '5155', '2071', '49', 't', 'b', 'm', 'o', '5187', '4073', 'q', '1617', 'e', '1227', 'n', '9133', '7773', 'm', '1265', 'n', '6387', 'b']

b, e, h, i, k, l, m, n, o, q, t, v, w