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]: ['p', 'p', '7899', 'u', '971', '7289', 't', '5217', 'k', 'z', 'y', 'y', '6905', '9499', '4085', 'x', '955', 'v', 'j', '9049', '7927', '1757', '193', '2181']
[A]: j, k, p, t, u, v, x, y, z


[Q]: ['s', 'm', 's', 'o', '9979', '901', '3517', 'v', '2021', 'x', '4199', 'v', '963', 'o', '6405', 'u', 'i', '8201', '6643']
[A]:
i, m, o, s, u, v, x