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: ['9783', '3185', '8225', 'u', '1123', 'd', '3453', 'i', '7713', '8457', '8609', 'h', '2767', 'e', '7191', '2929', '1089', '393', 'e', 'd', '11', '9329', '683', '1271']

A: d, e, h, i, u
****
Q: ['7109', '1243', 'f', 'z', 'h', 'd', '6169', 'v', 'h', '3609', '3181', 'd', '3661', '7193', '7341', '9127', 'r', '1623', '5813', 's', 'd', '4011', '4983', 'n', '4195']

A: d, f, h, n, r, s, v, z
****
Q: ['t', '3647', 'j', '327', '6745', 'b', '3141', '3801', 'j', '1785', 'r', '7103', 'v', '7295', 'r', '679', '9443', 'g', 'c', 'l', 'a', '5971', 'i', 'a', 'i', '4451', '241', '853', 'c', 's', 'j', '6345', 'z', '8761', '9213', '2665', '9053', 't', '5993', 'k', '1347', 't', '3403', '5589']

A:
a, b, c, g, i, j, k, l, r, s, t, v, z
****