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]: ['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]: ['7073', 'd', 'e']
[A]: d, e


[Q]: ['g', 'p', 'a', '7835', '7465', 'j', '9533', '3247', '6679', 'l', '1061', 'n', '1503', '4347', '2089', '8611', '5463', '321', '6939', '3573', '9651', 'a', 'e', 's', 'j', '7795', '929', 'r', 'a', '5401', '545', '8067', 'z', '157', 'b', 'l', '2991', '1043', 'o', '5311', 'r', '9147', 'q']
[A]:
a, b, e, g, j, l, n, o, p, q, r, s, z