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]: ['g', '8591', '4463', '2189', '7901', '1457', 'f', 'i', '9031', 'r', '5519', '3955', 'd', '2093', 'c', 'y', '6591', '6463', 'h', '4371', '111', 'p', '3221', '4185', 'p', '8761', 'w', 'p']
[A]: c, d, f, g, h, i, p, r, w, y


[Q]: ['4993', 'n', '7115', 'f', 'd', 'q', '249', '3203', 'w', '5689', '4103', '7129', '603', 'e', 'z', '5571', '3241', '6029', '2721', '8451', 'o', '7841', 'p', '6271', 'r', 'b', '9481', '4045', 'v']
[A]: b, d, e, f, n, o, p, q, r, v, w, z


[Q]: ['r', '1763', 'v', 'j', '8673', '1923', '4439', 'a', 's', '8641', 'r', '2117', '4223', 'd', 'm', 'r', 'a', '3261', '2039', 'b', '4691', '6427', 'o', 'h', '1133', '431', '9449', '5145', '993', '1179', 'm', 's', 'a', 'w', '9893', 'e', '4783', '7269']
[A]:
a, b, d, e, h, j, m, o, r, s, v, w