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]: ['c', 'h', '8655', 'r', '7531', 's', 'r', 'w', 'e', 's', 'p', '1709', '5447', 'b', '5855', 'w', 'f', 'i', '7809', 'q', '1975', 'z', '4037', 'k', 'l', 'z', 'g', '9739', '8801', '3405', '6549', '4561', 'd', '1669']
[A]: b, c, d, e, f, g, h, i, k, l, p, q, r, s, w, z


[Q]: ['z', '5601', '5675', 'w', 's', 'z', '9213', '9563', '1699', 'p', 'g', 'm', 'c', '9279', '4481', 'p', 'n', '2389', 'c', '503', '1901', '8827', '1701', '1607', '5633', 'a', 'z', 'g', '3175', 's', 'l', 'l', '6811', '1821', '693', '8277', 'q', '8623', 'o']
[A]: a, c, g, l, m, n, o, p, q, s, w, z


[Q]: ['j', '501', '9649', 'w', 'o', '1985', 'l', 'o', 'p', '6227', 'l', '8035', '925', 'e', 'm', 'm', 'j', 't', 'f', '5729', 'i', 'j', 'h']
[A]:
e, f, h, i, j, l, m, o, p, t, w