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.

['c', '6027', 'o', 'h', 'l', '7893', 'u', 'f', '7661', '4715', '1373', '4799', 'd', 'z', '411', '4753', 'd', '8241', '1589', '4173', '3921', 'j', 'o', '5067', '8879', 'e', 'm', '9543', '9625', '855', 'u', 'd', '5859', '4243', '5747', '5147', '7315', 'd', 'x', 'q', '7841', '7397', 'm']
c, d, e, f, h, j, l, m, o, q, u, x, z

['f', '3409', 'i', '4147', '1745', '6007', 'l', 'd', 'i']
d, f, i, l

['q', '8863', '271', '1047', '5273', '6703', 'o', 'f', 'h', '5063', 'i', '2987', 'p', 't', 'm', 'w', '9833', 'q', '2991', 'h', 'i', '2617', 'z', 't', '5887', 'p', '8569', '3417', 'j', 'm', 'j', '101', 'j']

f, h, i, j, m, o, p, q, t, w, z