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: ['3627', '2051', '3203', 'c', 'r', 'a', '1453', 'e', 'z', 't', '1093', '4651', 'a', 'f', '8159', '9623', 'l', 't', 'r', '6963', '7071', '8103', '3493', 'y', '2369', '609', '2011', 'f', '187', 'f', 'c']

A: a, c, e, f, l, r, t, y, z
****
Q: ['5785', 'c', 'f', '7087', 'd', '9225', 'm', 'g', '4639', '7165', '3445', '3813', 'p', 'i', '719', 's', 'g', '6423', '9563', 'w', 'm', '8659', '8809', '4105', '3923', '465', '5637', '5547', 'h', 'v', '9453', '4009']

A: c, d, f, g, h, i, m, p, s, v, w
****
Q: ['n', '6559', '117', 'm', '6569', 'e', '3711', 'o', '4601', '4439', 'p', 'g', '977', '8429', 'e', '649', 'n', '9013', '5043', '1861', '7353', '9761', 'd', 'b', '6247', '441', 'd', '2509']

A:
b, d, e, g, m, n, o, p
****
