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]: ['f', '7573', '2067', 'n', '3671', '7969', '7889', '4893', '6501', 'l', 'y', '4331', 'a', 'e', '2081', '3863', 't', 'j', '7921', 's', '7203', '7797', 'f', '4279', '1299', '987', '5003', '9071', '9559', '6061', '1889', '2653', 'm', 'w', '665', '7343', '9763', 'r', '6343', '9393', '9289']
[A]: a, e, f, j, l, m, n, r, s, t, w, y


[Q]: ['2775', '7507', 'c', '4417', '3449', 'y', 'z', 'e', 'f', '9515', '8555', '7269', '8353', '4239', '4347', '4479', '8645', '9925', 'o', 'h', 'o', '8641', 'y', '3251', '1191', 't', 'x', 'z', '7203', 'b', 'b', '7545', '7283', 'z', 'y', '8127', 'x', 'l', '6251', 'y']
[A]: b, c, e, f, h, l, o, t, x, y, z


[Q]: ['9673', 'x', 'f', '3705', '4567', 'w', '6707', '9245', 'y', '7053', '4889', 'f', 'v', 'z', '3173', '7027', '4471', 'r', '5239', 'y', '5649', 'l', '9503', '3325', 'p', '3007', 'm', '6885', '1255', 'm', 'g', 'b', '2209', 'f', '6269', 'w', '9567', '7129', 'j', 'v', 'k']
[A]:
b, f, g, j, k, l, m, p, r, v, w, x, y, z